www.xtremepapers.net
... The general form of the rate equation is as follows. rate = k[H2O2]a[I–]b[H+]c (a) Suggest how the appearance of the solution might change as the reaction takes place. ...
... The general form of the rate equation is as follows. rate = k[H2O2]a[I–]b[H+]c (a) Suggest how the appearance of the solution might change as the reaction takes place. ...
Thermochemistry - hrsbstaff.ednet.ns.ca
... universe is constant. In other words, energy can be neither destroyed nor created. This idea can be expressed by the following equation: ∆Euniverse = 0 Energy can, however, be transferred from one substance to another. It can also be converted into various forms. In order to interpret energy changes ...
... universe is constant. In other words, energy can be neither destroyed nor created. This idea can be expressed by the following equation: ∆Euniverse = 0 Energy can, however, be transferred from one substance to another. It can also be converted into various forms. In order to interpret energy changes ...
Page 1 of 9 Chem 103 Practice Problems: Below is a key for both
... Solution: Some possibilities are: a) lower [O2] , b) increase [O3], c) adding a catalyst. (6) Draw an energy diagram showing an endothermic reaction showing the activation energy(Ea). Label what would represent the H and Ea in your diagram. Show effect of catalyst. Which direction does a catalyst s ...
... Solution: Some possibilities are: a) lower [O2] , b) increase [O3], c) adding a catalyst. (6) Draw an energy diagram showing an endothermic reaction showing the activation energy(Ea). Label what would represent the H and Ea in your diagram. Show effect of catalyst. Which direction does a catalyst s ...
2014_S4_CHM_NORMAL (ALL)
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
DRAFT AP® CHEMISTRY 2005 SCORING GUIDELINES
... 4. Write the formulas to show the reactants and the products for any FIVE of the laboratory situations described below. Answers to more than five choices will not be graded. In all cases, a reaction occurs. Assume that solutions are aqueous unless otherwise indicated. Represent substances in solutio ...
... 4. Write the formulas to show the reactants and the products for any FIVE of the laboratory situations described below. Answers to more than five choices will not be graded. In all cases, a reaction occurs. Assume that solutions are aqueous unless otherwise indicated. Represent substances in solutio ...
File
... A. What is the Ksp of CaF2 at this temperature? B. At this temperature, what is the maximum molarity of Ca2+ which can remain in a solution which contains an F– concentration of 0.0200 M ? II. The Ksp of Ba(IO3)2 is 6.0 x 10–10 at 25o C. ...
... A. What is the Ksp of CaF2 at this temperature? B. At this temperature, what is the maximum molarity of Ca2+ which can remain in a solution which contains an F– concentration of 0.0200 M ? II. The Ksp of Ba(IO3)2 is 6.0 x 10–10 at 25o C. ...
Chemistry 2 Higher revision mark scheme
... germanium is brittle germanium tetrachloride is a (volatile) liquid made of molecules germanium tetrachloride has covalent bonding or when two non-metals react they have covalent bonding GaC14/the salt of germanium undergiven hydrolysis/reacts with water germanium is not a good conductor of electric ...
... germanium is brittle germanium tetrachloride is a (volatile) liquid made of molecules germanium tetrachloride has covalent bonding or when two non-metals react they have covalent bonding GaC14/the salt of germanium undergiven hydrolysis/reacts with water germanium is not a good conductor of electric ...
Slide 1 ______
... Energy continued Energy can change form. Chemical potential energy in gasoline becomes mechanical energy driving the pistons and radiant energy in heat, Chemical energy in foods are converted to usable mechanical energy in our bodies or stored as other forms of potential energy. ...
... Energy continued Energy can change form. Chemical potential energy in gasoline becomes mechanical energy driving the pistons and radiant energy in heat, Chemical energy in foods are converted to usable mechanical energy in our bodies or stored as other forms of potential energy. ...
4 Types of Chemical Reactions and Solution Stoichiometry
... Because of this unequal charge distribution, water is said to be a polar molecule. It is this polarity that gives water its great ability to dissolve compounds. A schematic of an ionic solid dissolving in water is shown in Fig. 4.2. Note that the “positive ends” of the water molecules are attracted ...
... Because of this unequal charge distribution, water is said to be a polar molecule. It is this polarity that gives water its great ability to dissolve compounds. A schematic of an ionic solid dissolving in water is shown in Fig. 4.2. Note that the “positive ends” of the water molecules are attracted ...
Analyze
... (b) Because two moles of CO are produced from CO 2 (which is not an element) and C, this reaction does not represent H f° . (c) Because two substances are produced and one of the reactants (CO 2) is not an element, this reaction does not represent H f° . (d) One mole of CH4 is produced from elemen ...
... (b) Because two moles of CO are produced from CO 2 (which is not an element) and C, this reaction does not represent H f° . (c) Because two substances are produced and one of the reactants (CO 2) is not an element, this reaction does not represent H f° . (d) One mole of CH4 is produced from elemen ...
Theoretical Competition - Austrian Chemistry Olympiad
... 5.2. Write down a balanced equation for the reaction of I- with H2O2! H2O2 + 2 H+ + 2 I- ⇌ 2 H2O + I2 5.3. Calculate the potential difference for the reaction in 5.2.. ΔEƟ = EƟ2 - EƟ1 = 1.763 – 0.535 = 1.228 V 5.4. Calculate the free standard enthalpy and the equilibrium constant for the reaction in ...
... 5.2. Write down a balanced equation for the reaction of I- with H2O2! H2O2 + 2 H+ + 2 I- ⇌ 2 H2O + I2 5.3. Calculate the potential difference for the reaction in 5.2.. ΔEƟ = EƟ2 - EƟ1 = 1.763 – 0.535 = 1.228 V 5.4. Calculate the free standard enthalpy and the equilibrium constant for the reaction in ...
2010 Released SOL
... Covalent bonds are between 2 nonmetals (ionic would have a metal and nonmetal) Fluorine is a nonmetal so we need another nonmetal carbon is a nonmetal yes potassium is a metal no neon is a nonmetal, but it is also a noble gas. Therefore it is extremely stable and does not reac ...
... Covalent bonds are between 2 nonmetals (ionic would have a metal and nonmetal) Fluorine is a nonmetal so we need another nonmetal carbon is a nonmetal yes potassium is a metal no neon is a nonmetal, but it is also a noble gas. Therefore it is extremely stable and does not reac ...
BIOL 157 * BIOLOGICAL CHEMISTRY Lecture 6
... • For reactions that occur in two phases (gas/solid or liquid/solid), the ...
... • For reactions that occur in two phases (gas/solid or liquid/solid), the ...
Balanced Equations And Equilibrium Constants
... that when solving for equilibrium constants, the activities of pure solids and liquids are one, so (NH4)2CO3(s) is not included in the equation. Kc = [NH3]2[CO2][H2O] It is more appropriate to use Kp because all the constituents in the equation are gases: Kp = (PNH3)2(PCO2)(PH2O) Side note: Remember ...
... that when solving for equilibrium constants, the activities of pure solids and liquids are one, so (NH4)2CO3(s) is not included in the equation. Kc = [NH3]2[CO2][H2O] It is more appropriate to use Kp because all the constituents in the equation are gases: Kp = (PNH3)2(PCO2)(PH2O) Side note: Remember ...
2010 Exam
... Select the letter of the correct response from those provided. EITHER shade the letter on your computer scorable card OR place the letter in the blank provided on your Multiple Choice Answer Sheet, whichever format is being used by your school for this exam. Do ALL questions in this section. ...
... Select the letter of the correct response from those provided. EITHER shade the letter on your computer scorable card OR place the letter in the blank provided on your Multiple Choice Answer Sheet, whichever format is being used by your school for this exam. Do ALL questions in this section. ...
Chapter 2 power point File
... An element is so small that you need a small unit just to measure them Atomic mass unit (amu) is 1.66 x 10-24 g The atom carbon has a weight of 12 amu Hydrogen has a weight of 1 amu The large number in each square of the periodic table is an element’s average weight in amu The atomic mass has two im ...
... An element is so small that you need a small unit just to measure them Atomic mass unit (amu) is 1.66 x 10-24 g The atom carbon has a weight of 12 amu Hydrogen has a weight of 1 amu The large number in each square of the periodic table is an element’s average weight in amu The atomic mass has two im ...
Document
... Asp-His-Ser catalytic triad and oxyanion hole to facilitate tetrahedral intermediate The tetrahedral intermediate is mimicked in a complex of Trypsin with Trypsin inhibitor ...
... Asp-His-Ser catalytic triad and oxyanion hole to facilitate tetrahedral intermediate The tetrahedral intermediate is mimicked in a complex of Trypsin with Trypsin inhibitor ...
Heat
... The combustion reaction for a substance is defined as the reaction of one mole of a single substance with O2(g) to form combustion products. Because of the way in which we have defined the combustion reaction we may have to use fractional coefficients for some of the reactants and products. The enth ...
... The combustion reaction for a substance is defined as the reaction of one mole of a single substance with O2(g) to form combustion products. Because of the way in which we have defined the combustion reaction we may have to use fractional coefficients for some of the reactants and products. The enth ...
Chemistry JAMB Past Questions
... X is crystalline salt of sodium. Solution of X in water turns litmus red produces a gas which turns lime water milky when added to sodium carbonate. With barium chloride solution, X gives a white precipitate which is insoluble in dilute hydrochloric acid. X is A. ...
... X is crystalline salt of sodium. Solution of X in water turns litmus red produces a gas which turns lime water milky when added to sodium carbonate. With barium chloride solution, X gives a white precipitate which is insoluble in dilute hydrochloric acid. X is A. ...
Practice Exam II
... Pb(NO3)2 + K2CrO4 PbCrO4 + 2KNO3 ? A)Pb(NO3)2/K2CrO4 or Pb(NO3)2/PbCrO4 B)K2CrO4/PbCrO4 or K2CrO4/2KNO3 C)Pb(NO3)2/2KNO3 or 2Pb(NO3)2/2K2CrO4 D) 3K2CrO4/3PbCrO4 or 2Pb(NO3)2/4KNO3 E) All of the above are correct unit-conversion factors. Note: p. p. 112-113: example & problem 4.16. Note that if the ...
... Pb(NO3)2 + K2CrO4 PbCrO4 + 2KNO3 ? A)Pb(NO3)2/K2CrO4 or Pb(NO3)2/PbCrO4 B)K2CrO4/PbCrO4 or K2CrO4/2KNO3 C)Pb(NO3)2/2KNO3 or 2Pb(NO3)2/2K2CrO4 D) 3K2CrO4/3PbCrO4 or 2Pb(NO3)2/4KNO3 E) All of the above are correct unit-conversion factors. Note: p. p. 112-113: example & problem 4.16. Note that if the ...
KINETICS questions
... (a) According to the data shown, what is the rate law for the reaction above? (b) On the basis of the rate law determined in part (a), calculate the specific rate constant. Specify the units. (c) What is the numerical value for the initial rate of disappearance of C2O42- for Experiment 1? (d) Calcul ...
... (a) According to the data shown, what is the rate law for the reaction above? (b) On the basis of the rate law determined in part (a), calculate the specific rate constant. Specify the units. (c) What is the numerical value for the initial rate of disappearance of C2O42- for Experiment 1? (d) Calcul ...
STUDY MATERIAL 2015-16 CHEMISTRY CLASS XI
... properties. Atoms of different elements are different in all respects. Atom is the smallest unit that takes part in chemical combinations. Atoms combine with each other in simple whole number ratios to form compound atoms called molecules. Atoms cannot be created, divided or destroyed during any che ...
... properties. Atoms of different elements are different in all respects. Atom is the smallest unit that takes part in chemical combinations. Atoms combine with each other in simple whole number ratios to form compound atoms called molecules. Atoms cannot be created, divided or destroyed during any che ...
2013 Chemistry examination report
... clear that some students had underestimated the amount of detail expected in responses to this question. In Question 4aii. some students struggled to explain the effect of volume change on two specified equilibriums. Question 5b. asked students to define’ the terms ‘equivalence point and ‘end point’ ...
... clear that some students had underestimated the amount of detail expected in responses to this question. In Question 4aii. some students struggled to explain the effect of volume change on two specified equilibriums. Question 5b. asked students to define’ the terms ‘equivalence point and ‘end point’ ...
Redox
Redox reactions include all chemical reactions in which atoms have their oxidation state changed; in general, redox reactions involve the transfer of electrons between species. The term ""redox"" comes from two concepts involved with electron transfer: reduction and oxidation. It can be explained in simple terms: Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, these are only specific examples of a more general concept of reactions involving electron transfer.Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. Like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously. The oxidation alone and the reduction alone are each called a half-reaction, because two half-reactions always occur together to form a whole reaction. When writing half-reactions, the gained or lost electrons are typically included explicitly in order that the half-reaction be balanced with respect to electric charge.Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation state — the actual transfer of electrons may never occur. The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state. In practice, the transfer of electrons will always cause a change in oxidation state, but there are many reactions that are classed as ""redox"" even though no electron transfer occurs (such as those involving covalent bonds).There are simple redox processes, such as the oxidation of carbon to yield carbon dioxide (CO2) or the reduction of carbon by hydrogen to yield methane (CH4), and more complex processes such as the oxidation of glucose (C6H12O6) in the human body through a series of complex electron transfer processes.