Question

The pH of an aqueous solution of 0.118 M potassium fluoride, KF (aq), is .

This solution is

_________acidicbasicneutral

Write the balanced NET IONIC equation for the reaction that occurs when nitric acid and calcium hypochlorite are combined. It is not necessary to include states such as (aq) or (s).

	+				+

This reaction is classified as:  _________Strong Acid + Strong BaseWeak Acid + Strong BaseStrong Acid + Weak BaseWeak Acid + Weak Base.

The extent of this reaction is: _________Below 50%50%Above 50%100%.

When 50.0 mL of 0.300 M nitric acid and 50.0 mL of 0.150 M calcium hypochlorite are combined, the pH of the resulting solution will be _________greater thanequal toless than seven.

Answer 1

1)

concentration of KF = 0.118 M

pH = 7 + 1/2 (pKa + log C)

    = 7 +1/2 (3.143 + log 0.118)

pH = 8.11

this solution is basic

2)

Net ionic equation :

H+ +   ClO^- -----------> HClO

this reaction is = Strong Acid + Weak Base

The extent of this reaction is = 100 %

3)

When 50.0 mL of 0.300 M nitric acid and 50.0 mL of 0.150 M calcium hypochlorite are combined,

the pH of the resulting solution will be less than seven.