NAME : SURNAME : CLASS : NUMBER : KAZAKH-TURKISH HIGH SCHOOLS 7th CLASS 1st MIDTERM 1-Define the following terms? (30 p) a)Matter b)Element c)Compound f)Boiling point g)Distillation h)Filtration d)Homogeneous mixture e)States of matter ý)Experiment j)Pure substance 2-Below,there is a list of substances.Write down the class of matter each belong to: (20 p) a)Gold--------------- b)Water------------- c)Sand and water------------------ d)Hydrogen-------------e)Alcohol&water-------------- f)air-------------- g)tea---------------- h)milk------------------ý)blood-------------j)sugar--------------------3-When 29,4 g of a metal is placed in a graduated cyclinder containing 10 ml of water.The water level rises to the 15 ml mark.What is the density of the metal ? (10 p) 4-A material has a density of 1.2 g/cm3 and a volume of 400 cm3. What is the mass of this object?(10p) 5-How can you separete the mixture of a)sand and salt b)Iron dust and pepper (20 p) 6-How can you measure the volume of your pen? Suggest a procedure. (10 p) NAME SURNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 7 th CLASS 2 nd MIDTERM 1-Define the fol lowing terms. (10 p) a) atom b) isotope c) atomic mass number d) ionic compound e) ions 2-Find the number of protons, neutrons and electrons in the calcium ion 40 Ca +2. (10 p) 20 3-Look at the table and indicate the isotope of the same element. (25 p) Atomic number A B C D ---------12 ----- Mass number 20 ----------14 Protons 10 10 --------- Electrons -----------------7 Neutrons -----11 12 ------ 4-The mass number of Y atom is 42. An isotope of Y atom is 40Y.What is the neutron 20 number of Y atom? (10 p) 5-The number of neutrons of an atom is 5 more than the number of protons. If the mass number of the element is 65, find the atomic number. (15 p) 6-Complete the following sentences . (10 p) a) The smallest particle of calcium is a (n)_______________ b) The smallest particle of water is a (n)_________________ c) The charge of proton is____________________________ d) The electrically charged atoms are called______________ e) A__________ bond is a chemical bond forms by transferring electrons between two atoms. 7-Predict the formulas of the compound that form with given pairs of elements. (20 p) a) 13 Al - 17 Cl b) 11 Na - 8 O c) 20 Ca - 9 F d) 12 Mg - 8 O NAME : SURNAME : CLASS : NUMBER : KAZAKH-TURKISH HIGH SCHOOLS 7 th CLASS 3 rd MIDTERM 1-Predict the formula compound that forms with the given pairs of elements. (20 p) a) 1H - 8O b) 7 N - 9 F c) 6 C - 8 O d) 8 O - 9 F 2-Explain the types of formulas of compounds and give examples. (20 p) 3-Write the correct formula of compounds formed between the corresponding cations and anions. (20 p) Ions Sodium Silver Zinc Iron(II) Lead(IV) Oxide ________ _________ _________ _______ _________ 4-Name the following compounds. a) NaF _________________ b) FePO4 _______________ c) CaSO4 _______________ d) Fe2O3 _______________ e) AI2(CO3)3 ______________ Iodide Hydroxide _______ _______ _______ _______ ________ __________ __________ __________ ___________ ___________ Carbonate __________ __________ __________ __________ ___________ (20 p) f) N2O5 ___________________ g) NO2 ___________________ h) C3S2 ___________________ I) CCI4 ___________________ j) P4S3 ___________________ 5-Write the formulas of the following compounds. (20 p) a) Potassium carbonate __________ b) Zinc fluoride ________________ c) Calcium nitrate ______________ d) Magnesium hydroxide __________ e) Iron(II) chloride ______________ NAME SUNAME CLASS NUMBER : : : : f) Tetraphosphorus hexoxide _______ g) Dinitrojen pentoxide ___________ h) Sulfur trioxide ________________ I) Chlorine trifluoride _____________ j) Calcium sulfate dihydrate __________ KAZAKH-TURKISH HIGH SCHOOLS 7 th CLASS 4 th MIDTERM 1-Define these words. (25 p) a) acid b) base c) oxides d) salts e) acidic oxide 2-What are common characteristics properties of acids and bases? (25 p) 3-Look at the formula of the compounds listed, and indicate if they are an acid, base, salts, oxides. (acidic oxide, base oxide, neutral ....) (25 p) a) HCI ______________ b) NaCI _____________ c) CO _______________ d) SO3 _______________ e) Na2CO3 ____________ f) P2O5 ______________ g) H2SO4 _____________ h) ZnO ________________ I) Na2O ________________ j) AI2O3 _______________ k) NH3 ________________ l) H2O _________________ m) CaSO4 _______________ n) N2O _________________ p) CaO2 ________________ 4-Predict the products of the following reactions. HCI CO SO2 CaO CO2 H2SO4 Zn NH3 AI2O3 Cu NAME SUNAME CLASS NUMBER + + + + + + + + + + : : : : (25 p) NaOH ------> ______________________ H2O ------> ______________________ H2O ------> ______________________ HCI -------> ______________________ CaO -------> ______________________ CaCO3 ------> ______________________ HCI ------> ______________________ Be(OH)3 -----> ______________________ H2O ------> ______________________ HCI ------> ______________________ KAZAKH-TURKISH HIGH SCHOOLS 8 th CLASS 1 st MIDTERM 1-Define the following terms. a) chemical change f) salt b) physical change g) oxide c) chemical reaction h) neutralization d) acid e) base 2-Classify each of the following as a chemical or a physical change. a) burning paper f) melting snow b) rusting iron c) souring milk d) ice melting 3-Balance the following equations. a) b) c) d) e) f) N2 + Na + Ag2 O CaCO3 Mg + CH4 + H2 SF6 --------> --------> ---------> ---------> HCI ---------> O2 ---------> NH3 Na2S Ag CaO MgCI2 CO2 + + + NaF O2 CO2 + H2O 4-Complete and balance the following equations. a) b) c) d) Na Mg Cu NaOH + + + + HCI --------> H2SO4 --------> HCI ---------> HCI --------> 5-Classify each of the following as an acid, a base or a salt. a) CH3COOH f) Na2CO3 NAME SUNAME CLASS NUMBER : : : : b) HNO3 g) H2SO4 c) Ba(OH)2 h) HCI d) Mg(OH)2 e) KNO3 e) hard boiling egg KAZAKH-TURKISH HIGH SCHOOLS 8th CLASS 2nd MIDTERM 1-Explain exothermic and endothermic reactions, give examples. (20 p) 2-How many kinds of reactions are there and give an example for each type? (20 p) 3-Balance the following reactions. a) b) C4H10 + O2 -------> CO2 + H2O H2SO4 + AI(OH)3 -------> AI2(SO4)3 + H2O 4-Fill in the blanks. (20 p) a) The type of reaction in which energy is liberated to the surrounding is called________________ b) The type of reaction in which energy is supplied for the reaction from the surrounding is called ___________________________ c) The scientific name of burning is _______________________ d) In a type of reaction , the structure of a compound changes to give simplier substances. This is called_________________________ 5-Complete the following reactions. (20 p) a) H2SO4 + NaOH ---------> _______________________ b) HCI + Zn ---------> __________________________ c) NaOH + AI --------> ___________________________ d) KCIO3 e) N2 NAME SUNAME CLASS NUMBER : : : : heat + H2 _________________________ ---------> ____________________________ KAZAKH-TURKISH HIGH SCHOOLS 8th CLASS 3rd MIDTERM 1-Find the mole numbers of the followings. (25 p) a) 3.01x1022 N2 molecules = ? b) 4.4 g CO2 =? c) 5.6 Iiter (STP) SO2 =? d) 4.9 g H2SO4 = ? (N=14, C=12, O=16, S=32, H=1) 2-Answer these questions for 29 g of butane gas, C4H10 at STP ( C = 12 , H = 1 ) . Find ; (25p) a) Its mole number b) Its molecule number d) The mole number of H atoms it contains c) The mole number of C atoms it contains e) The total number of atoms it contains f) Its volume 3-0.05 mole X2O3 weighs 5.1 g . Calculate the atomic weight of X ? (O=16 g/mole) (25 p) 4-According to the following reaction ; AI2(OH)3 + H2SO4 --------> AI2(SO4)3 + H2O How many grams of H2O are produced by the reaction of 39 g AI(OH)3 with H2SO4 ?(25p) (AI=27, O=16, H=1, S=32) NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 8th CLASS 4th MIDTERM 1- Aluminum and hydrogen bromide react according to the following reaction. (20 p) 2Al + 6 HBr -------- 2AlBr3 + 3H2 lf 4 mol of Al and 9 mol of HBr are allowed to react , a) Which of the two reactants is the limiting one? b) How many moles of the excess reactant are left at the end of the reaction? c) What is the maximum mole number of H2 obtained? 2- The complete combustion of a 18.5 g of compound consisting of C, H and O produced 44 g of CO2 and 22.5 g of H2O. What is the empirical formula of the compound? (20 p) 3- A compound contains 85.71 % carbon and 14.90 % hydrogen. The molecular weight of this compound is 28 g.Find its molecular formula . (20 p) 4- When a 50 L of a mixture of CH4 and C2H4 gases is burned , 80 L of CO2 are produced at the same conditions.Calculate the volume of CH4 in the mixture. (20 p) 5- When 50 g of CaCO3 is heated 4.48 L of CO2 at STP is obtained.What percent of CaCO3 is decomposed ? (20 p) CaCO3 ---------> NAME SUNAME CLASS NUMBER CaO + CO2 (g) : : : : KAZAKH-TURKISH HIGH SCHOOLS 9th CLASS 1st MIDTERM 1- Compute PA , PB and Patm ? Patm A B h1 h3 h2 h1=80cmHg h2=20cmHg h3=23 cmHg 2- Under the same conditions, He (helium ) has a diffusion rate 4 times greater than that of the gas X. What is the molecular weight of the gas X ? (He=4) 3- A vessel which can hold 0.8 g of O2 can hold 1.45 g of X at the same conditions.Determine the molecular weight of X ? (O=16 g / mole) 4- A column of air 38 cm in length is trapped in a tube by placing a plug of mercury column of 4 cm length. When the tube and its contents are inverted figure ll is obtained.Calculate the height of the air column figure ll. ( Assume that the atmospheric pressure is 76 cmHg.) h2=? 4 cm 34 cm h1=38cmHg 5- Calculate the density of SO2 at STP ? (S=32 O=16) 6- Calculate the number of mole of 164 liter of O2 gas at 1.5 atm and 270 C ? 7- 8 g of O2 gas exert 300 mmHg pressure in a 400 ml container.lf 24 g of O2 gas are added into a container and the volume is expanded to 600 ml at the same temperature. What would be the new pressure ? 8- A gas mixture contains 1.5 mol of N2, 0.5 mol of O2 and 0.5 mol of CH4 gases. The total pressure is 2 atm. Calculate the partial pressure of each gas ? NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 9th CLASS 2nd MlDTERM 1- Calculate the percent by mass of the solute in each of the following solutions. a) 15 g NaCl in 360 g water b) 40 g sugar in 762 ml of solution with a density of 1.05 g/ml 2- What is the molarity of a 85 ml ethanol (C2H5OH) solution containing 1.77 g of ethanol ? 3- The 0.5 M , 200 ml of MgCl2 solution and 800 ml of AlCl3 solution are mixed, the concentration of Cl-1 ion is 5 M . What is the molarity of AlCl3 solution ? 4- How many ml of water must be added to 100 ml 0.6 M H2SO4 solution so that the concentration of the resulting solution will be 2 M ? 5- Calculate the molarity of each of the following solutions. a) 0.25 mol of NaOH in 500 ml of solution. b) 150 g CaCO3 in 5 liter of solution. 6- Calculate the mass of 75 % NaOH solution necessary to prepare 400 ml of 1.5 M NaOH solution. 7- Calculate the normality of the following solution . a) 49 g of H2SO4 in 200 ml of solution 8- Calculate the volume of 0.1 N CuSO4 solution that would contain 8 g of CuSO4. NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 9th CLASS 3rd MIDTERM 1- ln each of the following pairs indicate the species that is smaller in size. a) Na+1, Mg+2 b) Fe+2, Fe+3 c) l-1, Br-1 d) Al0, Al+3 2- Write the electron configurations of each of the following species. a) 17 Cl c) 24 Cr+3 b) 29 Cu d) 26 Fe+2 3- Complete the following statements. a) Two electrons in the same __________ must have opposite spin. b) When l=3, ml may have values from __________ to __________ c) The 2p orbitals of an atom have identical shape but differ in their __________ d) lonization energy of elements in the same periodic group __________as the atomic number increases e) Ca+2 has a smaller radius than K+1 because it has __________ 4- The successive ionization energies of X,Y,Z and Q elements are given; E1(kcal / mol) X Y Z Q 124 191 100 176 E2(kcal / mol) E3(kcal / mol) 700 200 2400 374 E4( kcal / mol) 1000 220 3000 1848 1200 4000 4500 2519 lf these elements react with O2, what will be their molecul formulas ? 5- XO4-3 has 50 electrons and 48 neutrons . What is the atomic mass number of X ? (16 O) 8 6- Arrange the elements in each of the following groups in increasing order of the electron affinity; a) Li, Na, K b) F, Cl, Br, l 7- Show the periodic properties of elements on periodic table NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 9th CLASS 4th MIDTERM 1- a) Find the group and period numbers of given elements. (By using electronic configuration) 12Mg, 20Ca, 35Br, 24Cr, 26Fe b) lf there are totaly 50 electrons in XO4-1 , find the group and periodic number of X element. 2- Complete the following equation. a) K + H2O -------> b) Li + H2 -------> c) Na + Cl2 --------> X X + H2O --------> 3- Write the general properties of noble gases and their preparations. 4- Write the differences between fission and fusion by giving two examples for each one. 5- The half life of radioactive element is 8 days. How long will it take for 75% of a sample to disappear ? 6- 226 Ra is a radioactive element. Which emissions should take place to 88 change 226 Ra to 86 222 Rn ? 86 7- C(graphite) + O2(g) ---------> CO2(g) C(diamond) + O2(g) ---------> CO2(g) C(diamond) ---------> C(graphite) 8- CO2(g) Na2CO3(s) HCl(g) H2O(g) NaCl(s) H = - 94.05 kcal H = -94.5 kcal H = ? Hf = - 94 kcal / mol Hf = - 270 kcal/mol Hf = - 22.1 kcal/mol Hf = - 57.8 kcal/mol Hf = - 98.2 kcal(mol According to above formation energies , calculate the entalpy change of the following reaction; Na2CO(s) + 2HCl(g) --------> CO2(g) + 2NaCl(s) + H2O(g) NAME : SUNAME : CLASS : NUMBER : KAZAKH-TURKISH HIGH SCHOOLS 9th CLASS 1- C(s) + O2(g) ------> CO2(g) H2(g) + 1/2O2(g) -------> H2O(l) C2H6 + 7/2O2(g) -------> 2CO2(g) + 3H2O(l) 5th MIDTERM H1 = - 94 kcal H2 = - 68 kcal H3 = - 372 kcal What is the heat of formation of C2H6 ? 2- How many calories are required to change 9 g of ice at -20 0 C to vapor at 120 0 C ? Cice = 0.5 cal / g.0 C Cwater = 1 cal / g.0 C Cvapor = 0.5 cal / g.0 C Lf = 80 cal / g Lv = 540 cal / g 3- Describe an industrial preparation for each of the halogens. 4- Complete and balance each of the following equations. lf no reaction occurs, write NO reaction. a) Cl2 + Nal(aq) c) Br2 + Kl(aq) ---------> ----------> b) l2 + KCl(aq) ----------> d) F2 + H2O(l) --------> 5- Complete and balance the following equations. a) K(s) + Br(s) ------> c) Na + H2O(l) -------> e) LiH(s) + H2O(l) --------> b) Na(s) + O2(g) ------> d) Na + H2(g) -------> 6- A certain metal, M, reacts with bromine to form the compound MBr3.Predict the formula of the oxide formed, when M reacts with oxygen. NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 10th CLASS 1st MIDTERM 1- The rate of the reaction A + 2B ------> C has been observed at 25 0 C , from the following data. Determine the rate expression and calculate the rate constant. Exp. 1 2 3 4 5 lnitial A(M) 0.1 0.2 0.4 0.1 0.1 lnitial B(M) 0.1 0.1 0.1 0.3 0.6 lnitial Rate(M/s) 5.5 x 10-6 2.2 x 10-5 8.8 x 10-5 1.65 x 10-5 3.3 x 10-5 2- lf 0.96 g Mg metal is compeletely used up in HCI solution in 50 seconds by the reaction. Mg + 2HCI ---------> MgCl2 + H2(g) What is the rate of formation of hydrogen gas in liter / second at STP ? 3- The activation energy for the reaction; CH4(g) + 2O2(g) ----------> CO2(g) + 2H2O(g) is 15.4 kcal. lf the entalpies of formation of methane (CH4), carbondioxide (CO2) and water (H2O) are -17.89 kcal/mole, -94.05 kcal/mole, and -57.8 kcal/ mole respectively. a) What is the activation energy for the reverse reaction ? b) Draw potential energy diagram for this reaction ? 4- Compare the rates of each following reactions; (V1) Fe+2(aq) + MnO4-1(aq) + 8H+1(aq) --------> 5Fe+3(aq) + Mn+2(aq) + 4H2O (V2) 2NO(g) + O2(g) ---------> 2NO2(g) (V3) CH4(g) + 2O2(g) ------> CO2(g) + H2O(g) (V4) Ag+1(aq) + Cl-1(aq) -------> AgCl(s) 5- Write expressions for Kc for the following reversible reactions at equilibrium: a) HF(aq) +H2O(I) <====> H3O+ (aq) + F-(aq) b) 2NO(g) + O2(g) <====> 2NO2(g) c) 2H2S(g) + 3O2(g) <====> 2H2O(g) + 2SO2(g) d) MgSO4(s) <====> MgO(s) + SO3(g) e) 2Al(s) + 6H+(aq) <=====> 3H2(g) + 2Al+3(aq) 6- Consider the following heterogeneous equilibrium; CaCO3(s) <====> CaO(s) + CO2(g) at 800 0 C, the pressure of CO2 is 0.236 atm. Calculate Kp and Kc for the reaction at this temperature. 7- Consider the reaction H2(g) + l2(g) <====> 2Hl(g) Starting with a concentration of 0.04 M for Hl, calculate the concentrations of Hl, H2 and l2 at equilibrium. 8- Given the mechanism for a reaction as follows; 2NO2(g) - -------> NO3(g) + NO(g) (slow) NO3(g) + CO(g) ---------> NO2(g) + CO2(g) (fast) a) Write the overall reaction for which the mechanism was given. b) Write the rate equation for this mechanism. What is the order of the reaction or mechanism ? NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 10th CLASS 2nd MIDTERM 1- At 2000 K the values of Kc are given for the reactions. 2CO(g) + O2(g) <====> 2CO2(g) H2O(g) <====> H2(g) + 1/2O2(g) Kc=1 x 10 8 Kc=2.5 x 10-5 Find the value of Kc at 2000 K for the reaction. H2(g) + CO2(g) <====> H2O(g) + CO(g) 2- The equilibrium constant (Kc) is 36 at a certain temperature for the following reaction, CO(g) + H2O(g) <====> CO2(g) + H2(g) Predict the direction in which the reaction will proceed to react equilibrium if it is started with; a) 1 mol of CO, 1 mol of H2O, 1 mol of CO2, and 1 mol of H2 in 1 L. container. b) 0.5 mol of CO, 0.5 mol of H2O, 3 mol of CO2, and 3 mol of H2 in 2 L. container. c) 0.5 mol of CO, 0.5 mol of H2O, 5 mol of CO2, 5 mol of H2 in 5 L. container. Calculate the equilibrium concentrations in each part. 3- Consider the following equilibrium process; kj PCl5(g) <====> PCI3(g) + CI2(g) Predict the direction of the reaction in equilibrium when ; a) the temperature is increased b) more chlorine gas is added to the reaction mixture c) some PCI3 is removed from the mixture d) the pressure on the gases is increased e) a catalyst is added to the reaction mixture 4- When 1L. of 0.15 M AgNO3 solution and 2 L. of 0.3 M NaI solution are mixed, AgI(s) is precipitated. At equilibrium what is the concentration of Ag+ ? ( Ksp for Agl is 1.5 x 10-16 ) 5- The solubility product for CaF2 is 3.2 x 10-11 at a certain temperature. What is the solubility of CaF2 in; a) pure water b) 0.01 M CaCl2(aq) c) 0.2 M NaF(aq) 6- 0.2 M AgNO3 solution is added gradually to a solution which contains 0.1 M each of Cl-1 and Br-1 ions.lf Ksp for AgCl is 1 x 10-10 and Ksp for AgBr is 5 x 10-13 a) which salt precipitates first ? b) what is the concentration of anion for the first salt when the second salt starts to precipitate ? NAME SUNAME CLASS NUMBER : : : : KAZAKH- TURKISH HIGH SCHOOLS 10th CLASS 3rd MIDTERM 1- Lemon juice has a H+ ion concentration of 4 x 10-3 M. Calculate the concentration OH-, pH, and pOH of the lemon juice. (log 4=0.6) 2- lndicate the Bronsted-Lowry acid base pairs in the following equations. a) HSO4b) NH3 c) HC2O4d) NH4+ + HPO4-2 + H+ HS+ H2O <=====> <=====> <======> <=====> H2PO4- + SO4-2 NH2+ H2 C2O4-2 + H2S H3O+ + NH3 3- The following reactions contain conjugate acid base pairs. Complete these reactions. a) HCI + NH3 <===> _____ + ______ b) NH3 + CN- <===> _____ + _____ -2 c) H2PO4 + CO3 <====> _____ + ____ d) HCOOH + H2O <===> _____ + ____ 4- Decide if each of the following substances is a Lewis acid or Lewis base ? a) OH- c) H+ b) NH3 d) CH3+ 5- Fill in the word acidic, basic, or neutral for the following solutions. a) pOH>7; solution is _____________ c) pOH=7; solution is _____________ b) pOH<7; solution is ____________ 6- Which compound of each of the following pairs is stronger acid ? a) H3PO4 or H3AsO4 d) H3BO3 or H2CO3 b) H3AsO3 or H3AsO4 e) H2Se or HBr c) H2SO4 or H2SO3 7- A 50 ml sample of 0.1 M H2SO4 solution is completely neutralized by 20 ml of KOH solution. What is the molarity of the base solution ? 8- lf 0.1 M HCN solution has a H3O+ = 6 x 10-6 M , what will be the dissociation constant for HCN ? (HCN (aq) + H2O <===> CN- 1(aq) + H3O+(aq) ) 9- Calculate the pH of the buffer solution prepared by adding 0.45 mol of sodium formate, HCOONa, and 0.25 mol of formic acid, HCOOH to enough water to make 250 ml of solution. ( Ka= 1.8 x 10-4 ) 10- Define the following terms; a) electrolyte NAME SUNAME CLASS NUMBER b) end point c) buffer solution d) hydrolysis : : : : KAZAKH-TURKISH HIGH SCHOOLS 12th CLASS 2nd MIDTERM 1- Balance the following equations. a) KOH + CI2 -------> KCI + KCIO3 + H2O b) CIO3-1 + I-1 -------> I2 + CI-1 -1 -1 c) Cr(OH)3 + IO3 ------> I + CrO4-1 ( acid solution) ( basic solution) 2- The following reactions occur spontaneously; (l) X(s) + 2Y+(aq) -------> X+2(aq) + 2Y(s) (ll) 2Z(s) + 3Y+2(aq) -------> 2Z+3(aq) + 3Y(s) (lll) 2Z(s) + 3X+2(aq) -------> 2Z+3(aq) + 3X(s) Arrange the elements X , Y and Z in order of increasing strengh as oxidizing agents. Ag---> Ag+1 + 1eNi ----> Ni+2 + 2e- 3V E0=-0.8 volt E0=+0.25 volt salt brýdge Ag(s) Ni(s) NO3- Ni+2 Ag+ NO31 M Ni(NO3)2 1 M AgNO3 a) Does the cell work ? b) lndicate which electrode is anode or cathode ? c) How the masses of Ag and Ni electrodes change ? d) Write the cell reaction and calculate the cell potential ? 4- Calculate the amounts of Cu and Br2 produced at inert electrodes by passing a current of 4.5 A through a solution of CuBr2 for 1.0 hour. 5- What are the products of the electrolysis of the aquous FeCl2 solution ? Explain, why ? H2O H2O CI2 Fe+2 + e- + 2e+ 2e- -----> ------> -----> -----> 1/2H2 + OH1/2O2 + 2H+ + 2e2CIFe E0red= 0,00 volt E0ox= -1.23 volt E0red= +1.36 volt E0red= -0.44 volt 6- Draw an electrochemical cell in which the reaction is; 3Cd(s) + 2Au+3(aq) ------> 3Cd+2(aq) + 2Au(s) a) Show the anode and cathode ? b) Show the direction of movement of ions in salt bridge ? c) Show the direction of electrons in the external circuit ? 7-Write down the most important property of noble gases and hydrogen ? NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 11th CLASS 1st MIDTERM 1- Define the following terms. a) lonic Bond e) Electronegativity b) Covalent Bond f) Hydrogen Bond c) Octet Rule d) Hybridization 2- Given the molecules and ions of AlF3 , NH3 , CF4 a) Show the type of hybrid orbital used by the central atom. b) Show the orbital orientation. c) Show the shapes of the molecules. 3- Compare the strength of polarity of the following bonds. a) CO b) OF C=2.5 , O=3.5 , c) SiCl F=4.1 , d) NH e) NaF Si=1.8 , Cl=2.9 , N=3.1 , f) Br2 H=2.1 , Na=1.0 , Br=2.8 (Electronegativity values of some elements) 4- Predict the intermolecular bonds between the following substances. a) CH4 b) H2O c) HCI d) CO2 e) K f) AICI3 g) C 5- Compare the boiling points of the following compounds ? a) HF b) CCI4 c) NH3 d) H2O e) F2 g) CO 6- Explain the metallic bond ? 7- What are the differences between organic and inorganic compounds ? NAME SUNAME CLASS NUMBER : : : : KAZAKH-TURKISH HIGH SCHOOLS 11th CLASS 2nd MIDTERM 1- Write the structural formulas for; a) b) c) d) e) f) 2,3 dimethyl pentane 3-ethyl-3methyl-1-pentene 2,5 dimethyl-3-hexyne 1,2,4 tribromo heptane 3-isopropyl-1-hexyne isobutane 2- Name the following compounds by the lUPAC system. _ a) CH3-C=C-CH3 b) CH3-CH-CH=C-CH3 CH3 CH3 c) CH3-CH-CH-CH2 CI CI CI d) H H C=C CH3 CH3 3- Write equations for the reactions of; e) CI C2H5 C=C CH3 CI h) H2 a) b) c) d) H2 with cis-2-pentene HBr with (C2H5)2C=CH2 Cl2 with propene H2O with butene 4-Starting from propyne, show how each of the following compounds could be prepared? a) 2-butyne b) 2-chloro propene c) cis-2-butene d) isopropyl iodide 5- What is (are) the product(s) of the following reactions ? a) C2H5Br + CH3Br + 2Na b) 2-butyne + Br2 --------> c) C2H5Cl + Mg (dry ether ) d) CaC2 + H2O -------> ------------> 6- lf a 3 g sample of a hdyrocarbon is burned , 5.4 g of water vapour is produced. What is the molecular formula of the hydrocarbon ? 7- lf 0.5 mole C2H5 and C2H6 mixture react with AgNO3 solution that contains NH3 medium, 48 g of white precipitate form. What is the mass of C2H6 in mixture ? (Ag=108, C=12, H=1) NAME : SUNAME : CLASS : NUMBER : KAZAKH TURKISH HIGHSCHOOLS 11th CLASS 3rd MIDTERM 1- Write the structural formulas of following compounds. a) cyclo pentanol d) methyl ethonoate g) 2-hydroxy propanoic acid b) cis-2-buten-1-ol e) 3,3 dichloro hexonone h) 2-methyl pentanol c) vinyl ether f) 3-methyl hexanoic acid 2- Name each of the following compounds. O a) CH3 - CH - C - C2H5 CH3 b) CH3COOC3H7 d) CH3CH2CHCICHO e) Br - CH2 - CH2 - COOH c) CH3CH = CHCH2OH 3- Give an example of an isomer of each of the following; a) ethyl acetate b) diethyl ether c) acetone 4- What are the products of the following reactions ? a) 2-propanol + Na b) 2-pentanone + H2 c) propanoic acid + NH3 --------> -------> ------> d) butanal e) butanoic acid d) CH2CH2CHO + C2H5OH -------> e) butanal + Fehling” s reagent -------> 5- Using equations show how each of the following conversions can be carried out; a) 2-propanol to 2,3-dimetyl-2-butanol c) aldehyde to 3-butene-2-ol b) ethanol to 2-hydroxypropanoic acid 6- A 10 g mixture of methanol-methanal forms 54 g of silver when reacted with Tollens” reagent. What is the percentage by mass of alcohol in the mixture ? 7- 11.2 L. of H2 gas at STP is produced when 4 moles of ether-monoalcohol mixture react with Na metal. What is the mole percentage of ether in mixture ? 8- Explain the optical isomerism. Give examples. 9- 2.96 g of ester is formed by the reaction of 0.4 M, 100 ml of acetic acid with enough alcohol. Find the produced ester. 10- Compare the boiling points of the following compounds. O a) C2H5OH b) C2H5OCH3 c) C2H5CHO d) CH3- C-CH3 NAME SUNAME CLASS NUMBER e) CH3 COOH : : : : KAZAKH-TURKISH HIGH SCHOOLS 11th CLASS 4th MIDTERM 1- An aldehyde which can be prepared from 8.4 g of an alkene , precipitates 28.6 g of Cu2O, when reacted with Fehling”s reagent. What is the formula of an alkene ? 2- Draw structural formulas for ; a) diphenylamine b) benzamide c) p-nitroaniline d) aminoacedic acid e) meta nitro benzoic acid f) 1,4-dichloro benzene g) 2,4,6 trinitro phenol h) phtholic acid ý) o-chloro toluene i) p-bromo benzaldehyde 3- Give the structural formula for each of the following ; a) ketopentose b) aldohexose c) sucrose 4- Complete the following equations ; a) CH3CH2NH2 + HCI ------> b) CH3CHCOOH + NaOH -------> NH2 c) Aldotetrose + Fehling”s reagent -------> d) Toluene + CH3CI ( AICI3 ) e) p-nitrotoluene ( K2Cr2O7 ) f) nitrobenzene + conc.HNO3 ( H2SO4 - heat ) g) nitration of benzoic acid h) nitration of toluene d) -amino--methyl butyric acid 5- How many grams of cuprous oxide (Cu2O) is precipitated from 9 g of 80 % glucose ? 6- How many grams of dimethyl amine can be obtained from 6.4 g of methyl alcohol and 3.4 g of ammonia ? 7- Analysis of an -ammonia acid gave 40.45 % C, 15.73 % N, 35.96 % O, and 7.86 % H. What is the structural formula of the aminoacid ? 8- A 40 g mixture of phenol and benzyl alcohol can be neutralized by 8 g of NaOH .What is the percentage of phenol in the mixture ?