Question

QUESTION 1

What is the pH of a 1.5x10^-8 M solution of HCl?

	a.	6.97
	b.	7.03
	c.	7.82
	d.	6.18

1 points   

QUESTION 2

What is the pH when [HA^-] = [A^2-] for a weak diprotic acid?

	a.	pH = pK1
	b.	pH cannot be determined without concentrations.
	c.	pH = 7.00
	d.	pH = pK2

1 points   

QUESTION 3

The formula for Malonic acid is HO₂CCH₂CO₂H and it is a weak acid (K₁ = 1.42x10^-3 , K₂ = 2.01x10^-6).

What is the pH of a 0.25M solution of HO₂CCH₂CO₂Na?

	a.	2.8
	b.	4.3
	c.	8.6
	d.	5.8

1 points   

QUESTION 4

Which of the following solutions contain a conjugate pair?

	a.	A solution of NaOH and NaCl
	b.	A solution NH3 and NH4Cl
	c.	A solution of HCl and NaCl
	d.	A solution of HCl and NaOH

1 points   

QUESTION 5

Leucine is a diprotic amino acid ( K₁ = 4.677 x 10^-3, K₂ = 1.820 x 10^-10 ).

Determine the pH if 11.0 mL of 1M NaOH are added to 1L of 0.01 M of the acidic form of leucine.

	a.	6.04
	b.	2.33
	c.	9.74
	d.	8.79

Answer 1