Questions from General Chemistry

Q: Using the data in Problem 12-10, calculate pKw at

Using the data in Problem 12-10, calculate pKw at a. 0°C. b. 50°C. c. 100°C.

Q: A 0.7812-g sample of impure Al2(CO3

A 0.7812-g sample of impure Al2(CO3)3 decomposed with HCl; the liberated CO2 was collected on calcium oxide and found to weigh 0.04380 g. Calculate the percentage of aluminum in the sample.

Q: Using the data in Problem 12-10, calculate the pH

Using the data in Problem 12-10, calculate the pH of a 150  1022MNaOH solution at a. 0°C. b. 50°C. c. 100°C.

Q: What is the pH of an aqueous solution that is 3.

What is the pH of an aqueous solution that is 3.00% HCl by mass and has a density of 1.015 g/mL?

Q: Calculate the pH of a solution that contains 2.50%

Calculate the pH of a solution that contains 2.50% (w/w) NaOH and has a density of 1.015 g/mL.

Q: What is the pH of a solution that is 2.00

What is the pH of a solution that is 2.00 8 M in NaOH? (Hint: In such a dilute solution, you must take into account the contribution of H2O to the hydroxide ion concentration.)

Q: What is the pH of a 215  10

What is the pH of a 215  108 MHCl solution (see hint in Problem 12-15)?

Q: What is the pH of the solution that results when 0.

What is the pH of the solution that results when 0.093 g of Mg(OH)2 is mixed with a. 75.0 mL of 0.0500 M HCl? b. 100.0 mL of 0.0500 M HCl? c. 15.0 mL of 0.0500 M HCl? d. 30.0 mL of 0.0500 M MgCl2?

Q: Calculate the pH of the solution that results when mixing 15.

Calculate the pH of the solution that results when mixing 15.0 mL of 0.2500 M HCl with 25.0 mL of a. Distilled water. b. 0.132 M AgNO3. c. 0.132 M NaOH. d. 0.132 M NH3. e. 0.232 M NaOH.

Q: Calculate the hydronium ion concentration and pH of a solution that is

Calculate the hydronium ion concentration and pH of a solution that is 0.0500 M in HCl a. Neglecting activities. b. Using activities (see Chapter 8).