CHECC481 Analytical Chemistry

The pH of 10^-4 gmol hydrogen ion per liter of a solution is

• 7

• 8

• 5

• 4

The hydrogen ion concentration of a solution is a thousand times greater than the hydroxide ion concentration. Find the pH of the solution.

• 8.5

• 7.5

• 5.5

• 6.5

A certain aqueous solution at 25ºC has [OH^-] = 6.2 E -5 M. Calculate the pH of the solution.

• 4.21

• 5.80

• 8.20

• 9.79

A 0.01 M weak acid (contains one replaceable hydrogen) is 4.17% ionized. What is the ionization constant?

• 1.8E-5

• 1.2E-4

• 3.6E-5

• 1.2E-5

What is the concentration of an HCN solution which is 0.02% ionized? Ka = 4E-10.

• 0.001 M

• 0.01 M

• 0.1 M

• 1 M

What is the pH of a 0.10 M solution of nitrous acid (HNO2)? Ka = 7.2E-4

• 1.43

• 4.24

• 2.09

• 2.85

What is the pH of 7.0E- 8 M acetic acid?

• 6.85

• 4.76

• 8.90

• 5.76

Calculate the pH of 0.10 M NH3(aq). K = 1.8E-5

• 2.9

• 11.1

• 3.4

• 10.6

The pH of an acetic acid-sodium acetate buffer whose salt to acid ration is 2 is

• 4.74

• 5.05

• 6.95

• 8.95

Find the hydrogen ion concentration in a liter of solution that contains 12.0 grams of acetic acid and 8.2 grams of sodium acetate.

• 3.6 E-5 M

• 6.3 E-5 M

• 3.6 E-6 M

• 6.3 E-6 M