Homework #6

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Due on Feb 26 (Friday)

Q1

Determine whether aqueous solutions of the following salts are acidic, basic, or neutral:

NH₄CN
RbI
K₂CO₃
CH₃NH₃Br

Q2

Calculate the pH of 0.800 M potassium acetate (KCH₃COO) solution.

Q3

Choose the molecule that is more basic.

BrO₃^- vs BrO^-
BrO₂^- vs ClO₂^-
CH₃COO^- vs CF₃COO^-
aniline (C₆H₅NH₂) vs CH₃NH₂

Q4

A buffer solution of volume 50.0 mL contains 12.5 mmol HNO₂ and 9.25 mmol KNO₂.

What is the pH of this solution?
If 1.00 mmol of Ca(OH)₂ is added to the solution, what will be the new pH?
If 2.00 mL of 2.00M HCl is added to the original solution, what will be the new pH?