Question

1. is the pH of a 0.206 M aqueous solution of potassium fluoride, KF? (K_a for HF = 7.2×10^-4)

pH =

2. Consider the acid-base nature of the salt [C₂H₅NH₃]CN, when it is dissolved in water.

(a) What are the acid-base properties of the cation, C₂H₅NH₃⁺? _________acidic, basic, or neutral

(b) What are the acid-base properties of the anion, CN^-? _________acidic, basic, or neutral

(c) Would an aqueous solution of [C₂H₅NH₃]CN be acidic, basic or neutral? _________acidic, basic, or neutral

3. Consider the acid-base nature of calcium cyanide, Ca(CN)₂, when it is dissolved in water.

(a) What are the acid-base properties of the cation? _________acidic, basic, or neutral

(b) What are the acid-base properties of the anion? _________acidic, basic, or neutral

(c) Would an aqueous solution of calcium cyanide be acidic, basic or neutral? _________acidic, basic, or neutral

4. Write the net ionic equation for the equilibrium that is established when barium hypochlorite is dissolved in water.

_________	+			H2O = __________	+	_____________

This solution is

_________acidic, basic, or neutral.

5. Write the net ionic equation for the equilibrium that is established when potassium nitrite is dissolved in water.

_________	+			H2O = __________	+	____________

This solution is

_________acidic, basic, or neutral.

6. What is the pH of a 0.155 M aqueous solution of sodium cyanide, NaCN?

pH =

This solution is _________acidic, basic, or neutral.

7. What is the pH of a 0.119 M aqueous solution of ammonium chloride, NH₄Cl ?

pH =

This solution is _________acidic, basic, or neutral.

8. The acid ionization constant for Cu(H₂O)₆²⁺(aq) is 1.0×10^-7. Calculate the pH of a 0.0337 M solution of Cu(NO₃)₂.
pH =