A solution of ammonia NH3(aq) is at equilibrium. How would the equilibrium change if OH were added to the solution?
A. [NH4+] and [OH-] would increase.
B. [NH4+] and [OH-] would decrease.
C. [NH4+] would increase and [OH-] would decrease.
D. [NH4+] and [H+] would decrease.

15) a substance used in manufacturing gasoline consists of finely divided platinum supported on an inert solid. suppose that the platinum is formed by the high temperature reaction between platinum (iv) oxide and hydrogen gas. the other product is water. a) write and balance the equation b) how many grams of hydrogen are needed to produce 1.0 g of platinum metal? c) how many moles of water are produced at the same time? how many grams? ( show work, .)