Homework Exercises
... Write a balanced ionic equation for this reaction, again showing state symbols. Name the spectator ion(s) in this reaction. Re-write the ionic equation omitting the spectator ions. ...
... Write a balanced ionic equation for this reaction, again showing state symbols. Name the spectator ion(s) in this reaction. Re-write the ionic equation omitting the spectator ions. ...
File
... Alex’s hypothesis was that the rate will be affected by changing the concentrations of the propanone and the iodine, as the reaction can happen without a catalyst. Hannah’s hypothesis was that as the catalyst is involved in the reaction, the concentrations of the propanone, iodine and the hydrogen i ...
... Alex’s hypothesis was that the rate will be affected by changing the concentrations of the propanone and the iodine, as the reaction can happen without a catalyst. Hannah’s hypothesis was that as the catalyst is involved in the reaction, the concentrations of the propanone, iodine and the hydrogen i ...
South Pasadena • AP Chemistry
... 11. When H2SO4 and Ba(OH)2 are reacted in a double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2 ...
... 11. When H2SO4 and Ba(OH)2 are reacted in a double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2 ...
Question Paper - Revision Science
... 3 Which of the following mixtures would form the best buffer solution with pH 9 for use in a school laboratory? A Ethanoic acid and sodium ethanoate B Sodium chloride and sodium hydroxide C Hydrocyanic acid and sodium cyanide D Ammonium chloride and ammonia (Total for Question 3 = 1 mark) Use this s ...
... 3 Which of the following mixtures would form the best buffer solution with pH 9 for use in a school laboratory? A Ethanoic acid and sodium ethanoate B Sodium chloride and sodium hydroxide C Hydrocyanic acid and sodium cyanide D Ammonium chloride and ammonia (Total for Question 3 = 1 mark) Use this s ...
Gen Chem Final--review problems Fall 2006
... In a solution calorimeter, 50.0 mL of 0.100 M AgNO3 solution and 50.0 mL of 0.100 M HCl are mixed. The following reaction occurs: Ag+(aq) + Cl-(aq) Î AgCl(s) If the two solutions were initially at 22.6°C and the final temperature is 23.4°C, calculate qrxn and ΔHrxn. Assume that the surroundings are ...
... In a solution calorimeter, 50.0 mL of 0.100 M AgNO3 solution and 50.0 mL of 0.100 M HCl are mixed. The following reaction occurs: Ag+(aq) + Cl-(aq) Î AgCl(s) If the two solutions were initially at 22.6°C and the final temperature is 23.4°C, calculate qrxn and ΔHrxn. Assume that the surroundings are ...
Word - chemmybear.com
... 11. When H2SO4 and Ba(OH)2 are reacted in a double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2 ...
... 11. When H2SO4 and Ba(OH)2 are reacted in a double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2 ...
South Pasadena • AP Chemistry
... 11. When H2SO4 and Ba(OH)2 are reacted in a double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2 ...
... 11. When H2SO4 and Ba(OH)2 are reacted in a double replacement reaction, one of the products of the reaction is… a) H2 d) BaH2 b) H2O e) SO2 c) BaS 12. In the double replacement reaction between the weak acid, HC2H3O2 and strong base, NaOH, which ion(s) are spectator ions? a) Na+, C2H3O2– d) H+, C2 ...
system = part of the universe that contains the reaction or process
... Initial Temperature of water = 21.0ºC Final Temperature of water = 25.5ºC ...
... Initial Temperature of water = 21.0ºC Final Temperature of water = 25.5ºC ...
Chapters 14 and 15 Outline
... pH meter – is a device that determines the pH of a solution by measuring the voltage between the two electrodes that are in the solution. Titration – is a controlled addition and measurement of the amount of a solution of known concentration required to react completely with a measure of a solution ...
... pH meter – is a device that determines the pH of a solution by measuring the voltage between the two electrodes that are in the solution. Titration – is a controlled addition and measurement of the amount of a solution of known concentration required to react completely with a measure of a solution ...
國立嘉義大學九十二學年度
... 3.Calculate the density in g/L of chlorine gas at STP (A) 2.13 × 10-2 g/L (B) 46.9 g/L (C) 1.58 g/L (D) 3.16 g/L (E) 0.316 kg/L 4.Which statement is false? (A) The average kinetic energies of molecules from samples of different "ideal" gases is the same at the same temperature. (B) The molecules of ...
... 3.Calculate the density in g/L of chlorine gas at STP (A) 2.13 × 10-2 g/L (B) 46.9 g/L (C) 1.58 g/L (D) 3.16 g/L (E) 0.316 kg/L 4.Which statement is false? (A) The average kinetic energies of molecules from samples of different "ideal" gases is the same at the same temperature. (B) The molecules of ...
Unit 2.7: Periodic Table Group1 Group2 Li Be Na Mg K Ca Rb Sr Cs
... Light the burner and measure the time taken for the gas evolved to reach the mark on the test tube in the water bath Repeat the experiments by changing the salts. Titrations If the accurate concentration of the one solution is known, a titration can be used to determine the concentration of anot ...
... Light the burner and measure the time taken for the gas evolved to reach the mark on the test tube in the water bath Repeat the experiments by changing the salts. Titrations If the accurate concentration of the one solution is known, a titration can be used to determine the concentration of anot ...
BITSAT Chemistry
... a nickel catalyst and all the benzene converted to cyclohexane, the pressure of the gas was 30 mm of Hg in the same volume at ...
... a nickel catalyst and all the benzene converted to cyclohexane, the pressure of the gas was 30 mm of Hg in the same volume at ...
Slide 1 - Mrs. Reed Science Classes
... For the reaction represented by the equation Mg + 2HCl H2 + MgCl2, calculate the percentage yield of magnesium chloride if 100. g of magnesium react with excess hydrochloric acid to yield 330. g of magnesium chloride. a. 71.8% c. 81.6% b. 74.3% d. 84.2% ...
... For the reaction represented by the equation Mg + 2HCl H2 + MgCl2, calculate the percentage yield of magnesium chloride if 100. g of magnesium react with excess hydrochloric acid to yield 330. g of magnesium chloride. a. 71.8% c. 81.6% b. 74.3% d. 84.2% ...
chemistry important question i
... Explain the mechanism of acid catalysed hydration of an alkene to form corresponding alcohol. ...
... Explain the mechanism of acid catalysed hydration of an alkene to form corresponding alcohol. ...
Final Exam Review- no solutions
... a. Hg(l) + MnSO4(aq) HgSO4(s) + Mn(s) b. 2 Ag (s) + H2SO4(aq) Ag2SO4(aq) + H2(g) c. Ca(s) + 2 H2O(l) Ca(OH)2(aq) + H2(g) 11. Titration reveals that 11.6 mL of 3.0 M sulfuric acid are required to neutralize the sodium hydroxide in 25.00 mL of NaOH solution. What is the molarity of the NaOH solu ...
... a. Hg(l) + MnSO4(aq) HgSO4(s) + Mn(s) b. 2 Ag (s) + H2SO4(aq) Ag2SO4(aq) + H2(g) c. Ca(s) + 2 H2O(l) Ca(OH)2(aq) + H2(g) 11. Titration reveals that 11.6 mL of 3.0 M sulfuric acid are required to neutralize the sodium hydroxide in 25.00 mL of NaOH solution. What is the molarity of the NaOH solu ...
unit 4 practice
... hydroxide solutions of the same concentration. Which statement is correct? A. The initial pH values of both acids are equal. B. At the equivalence points, the solutions of both titrations have pH values ...
... hydroxide solutions of the same concentration. Which statement is correct? A. The initial pH values of both acids are equal. B. At the equivalence points, the solutions of both titrations have pH values ...
Practice Exam #2 with Answers
... _____15. A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 75.0 °C, determine the mass (in kg) of the copper sample if the specific heat capacity of copper is 0.385 J/g°C. A) 1.51 kg C) 1.26 kg ...
... _____15. A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 75.0 °C, determine the mass (in kg) of the copper sample if the specific heat capacity of copper is 0.385 J/g°C. A) 1.51 kg C) 1.26 kg ...
CHEMISTRY
... (3) +, +, (4) -,+,- 53. H2(g) +1/2 O2 (g) H298k=-285.8 kJ The molar enthalpy of vapourisation of water at 1 atm and 250C is 44 kJ. The standard enthalpy of formation of 1 mole of water vapour at 250 C is: ...
... (3) +, +, (4) -,+,- 53. H2(g) +1/2 O2 (g) H298k=-285.8 kJ The molar enthalpy of vapourisation of water at 1 atm and 250C is 44 kJ. The standard enthalpy of formation of 1 mole of water vapour at 250 C is: ...
Oregon State University, Summer 2009 Chemistry 121 Midterm
... a. A combustion reaction is one in which a compound reacts with oxygen to make carbon monoxide and water. b. The Law of Conservation of Matter (Mass) states that the total mass of substances in a chemical reaction does not change. c. In a chemical reaction, the number of atoms of all types remains c ...
... a. A combustion reaction is one in which a compound reacts with oxygen to make carbon monoxide and water. b. The Law of Conservation of Matter (Mass) states that the total mass of substances in a chemical reaction does not change. c. In a chemical reaction, the number of atoms of all types remains c ...
Chapters 6 and 17: Chemical Thermodynamics
... (d) If the volume of the combustion container is 10.0 liters, calculate the final pressure in the container when the temperature is changed to 110°C. (Assume no oxygen remains unreacted and that all products are gaseous.) ...
... (d) If the volume of the combustion container is 10.0 liters, calculate the final pressure in the container when the temperature is changed to 110°C. (Assume no oxygen remains unreacted and that all products are gaseous.) ...
Section II - School District 27J
... Identify the oxidizing agent. c. If a 0.300 mol sample of copper reacts with 10.0 mL of 12.0 M nitric acid, how many moles of nitrogen monoxide gas will form? d. If 0.672 g of nitrogen monoxide is recovered from this reaction, calculate your percent error. ...
... Identify the oxidizing agent. c. If a 0.300 mol sample of copper reacts with 10.0 mL of 12.0 M nitric acid, how many moles of nitrogen monoxide gas will form? d. If 0.672 g of nitrogen monoxide is recovered from this reaction, calculate your percent error. ...
6-1 Endothermic and Exothermic Reactions
... q = specific heat of water x grams of water x change in temperature specific heat of water = 4.18 J /(g oC) grams of water = 50. change in temperature = final temperature - initial temperature There are 4.184 Joules in one calorie. Clean Up: Barium is a toxic metal and must be disposed of by EH&S. C ...
... q = specific heat of water x grams of water x change in temperature specific heat of water = 4.18 J /(g oC) grams of water = 50. change in temperature = final temperature - initial temperature There are 4.184 Joules in one calorie. Clean Up: Barium is a toxic metal and must be disposed of by EH&S. C ...
4 • Reactions In Aqueous Solution
... equation for the reaction of washing soda, Na2CO3 and vinegar, HC2H3O2. ...
... equation for the reaction of washing soda, Na2CO3 and vinegar, HC2H3O2. ...
1 - UCSB C.L.A.S.
... surroundings? (cwater = 4.18 J/ºC g) 4. Consider the reaction: CaCl2(s) → Ca2+(aq) + 2Cl-(aq) ΔH = -81.5 kJ If 20.0 g of calcium chloride are dissolved in 150 mL of water at 25.0 C, what will be the final temperature of the solution assuming no heat loss to the surroundings? 5. Define the following ...
... surroundings? (cwater = 4.18 J/ºC g) 4. Consider the reaction: CaCl2(s) → Ca2+(aq) + 2Cl-(aq) ΔH = -81.5 kJ If 20.0 g of calcium chloride are dissolved in 150 mL of water at 25.0 C, what will be the final temperature of the solution assuming no heat loss to the surroundings? 5. Define the following ...
Thermometric titration
A thermometric titration is one of a number of instrumental titration techniques where endpoints can be located accurately and precisely without a subjective interpretation on the part of the analyst as to their location. Enthalpy change is arguably the most fundamental and universal property of chemical reactions, so the observation of temperature change is a natural choice in monitoring their progress. It is not a new technique, with possibly the first recognizable thermometric titration method reported early in the 20th century (Bell and Cowell, 1913). In spite of its attractive features, and in spite of the considerable research that has been conducted in the field and a large body of applications that have been developed; it has been until now an under-utilized technique in the critical area of industrial process and quality control. Automated potentiometric titration systems have pre-dominated in this area since the 1970s. With the advent of cheap computers able to handle the powerful thermometric titration software, development has now reached the stage where easy to use automated thermometric titration systems can in many cases offer a superior alternative to potentiometric titrimetry.The applications of thermometric titrimetry discussed on this page are by no means exhaustive. The reader is referred to the bibliography for further reading on the subject.