Problem 64
Given the chemical equation for the ionization of water $$ \mathrm{H}_{2} \mathrm{O}(l) \rightleftarrows \mathrm{H}^{+}(a q)+\mathrm{OH}^{-}(a q) $$ Predict the direction of equilibrium shift for each of the following stresses: (a) add gaseous \(\mathrm{HCl}\) (b) add solid \(\mathrm{NaOH}\) (c) add liquid \(\mathrm{H}_{2} \mathrm{SO}_{4}\) (d) add solid NaF
Problem 65
Explain why zinc hydroxide, \(\mathrm{Zn}(\mathrm{OH})_{2}\), is more soluble in hydrochloric acid than in water.
Problem 66
Explain why zinc carbonate, \(\mathrm{ZnCO}_{3}\), is more soluble in hydrochloric acid than in water.
Problem 67
A saturated solution of calcium hydroxide, \(\mathrm{Ca}(\mathrm{OH})_{2},\) has a \(\mathrm{pH}\) of \(12.35 .\) Find the hydroxide ion concentration and calculate the equilibrium constant.
Problem 68
A saturated solution of zinc hydroxide, \(\mathrm{Zn}(\mathrm{OH})_{2},\) has a \(\mathrm{pH}\) of \(8.44 .\) Find the hydroxide ion concentration and calculate the equilibrium constant.
Problem 70
The American Lung Association sponsors a website \(@\) www.stateoftheair.org. Go to the website and report the air quality for the city in which you live.
