1. A kinetics experiment is setup to collect the gas that is generated when a sample Of chalk，consisting primarily of solid C_aCO₃，is added to a solution of ethanoic acid，CH₃COOH.The rate of reaction between CaCO₃ and CH₃COOH is determined by measuring the volume of gas generated at22^。C and 1 atm as a function of time. Which of the following experimental conditions is most likely to increase the rate of gas production？

2. A 100g sample of a metal was heated to 100^。C and then quickly transferred to An insulated container holding 100g of water at 22^。C. The temperature of the water rose to reach a final temperature of 35^。C，Which of the following can be concluded？

3. Which of the following particulate diagrams best shows the formation of water vapor from hydrogen gas and oxygen gas in a rigid container at 125^。C？

4.

A 50.0 mL sample of an acid, HA, of unknown molarity is titrated，and the pH of the Resulting solution is measured with a pH meter and graphed as a function of the volume Of 0.100 M NaOH added.

At point R in the titration，which of the following species has the highest concentration？

5. Which of the following is the best particulate representation of the species(other than H₂O) that are present in significant concentrations in the solution at point. U in the titration？

6. At which point on the titration curve is[A^–]closest to twice that of[HA]？

7. A student carries out the same titration but uses an indicator instead of a pH meter. If the indicator changes color slightly past the equivalence point，what will the student obtain for the calculated concentration of the acid？

8. Questions 8-10 refer to three gases in identical rigid containers under the conditions given in the table below.

The average kinetic energy of the gas molecules is

9. The density of the gas, in g/L, is

10. If the pressure of each gas is increased at constant temperature until condensation occurs，which gas will condense at the lowest pressure？