Answer to Question #140480 in General Chemistry for Ashley

Question

The pKa value for HSO3- is 7.19. What mole ratio of K2SO3 to KHSO3 is needed to prepare a buffer with a pH of 7.40?

[SO32-] =
[HSO3

A 1 liter solution contains 0.517 M acetic acid and 0.388 M potassium acetate.

Addition of 0.194 moles of perchloric acid will:

(Assume that the volume does not change upon the addition of perchloric acid.)

Raise the pH slightly
Lower the pH slightly
Raise the pH by several units
Lower the pH by several units
Not change the pH
Exceed the buffer capacity

An aqueous solution contains 0.26 M nitrous acid.

One liter of this solution could be converted into a buffer by the addition of:

(Assume that the volume remains constant as each substance is added.)

0.26 mol NaCl
0.27 mol NaNO2
0.130 mol KOH
0.27 mol HCl
0.13 mol HCl

Answer 1

Dear Ashley, your question requires a lot of work, which neither of our experts is ready to perform for free. We advise you to convert it to a fully qualified order and we will try to help you. Please click the link below to proceed: Submit order