Question 1:

a) A cleaning product is 8% total ammonia as N on a mass basis and has a pH of 9.7. (Total ammonia is [NH₃] + [NH₄⁺]. The "as N" usage is common in environmental engineering). What is the partial pressure of ammonia gas that is in equilibrium with the solution?

b) If the solution above is at pH 9.7 and in equilibrium with air, calculate its total carbonate concentration.