A buffer system is prepared by combining 0.506 moles of ammonium chloride (NH4CI) and 0.720 moles of ammonia (NH3). What will the solution pH be if 0.230 moles of the nitric acid (HNO3) is added to the solution. Nitric acid is a strong acid. The K, of ammonia is 1.8 x 10-5. (Two decimal places)

Which of the following solutions will have the greatest buffering capacity given the following concentrations in that solution?

If 1.0 x 10^-1mol of HCl is added to a liter of a buffer solution that contains 1.5M sodium propionate (salt) and 1.0M propionic acid (acid), what is the pH of the resulting solution?

The indicator thymol blue changes from red to yellow between pH 1.2 and pH 2.8. If thymol blue is added to a solution, and the solution turns yellow, then     the pH of the solution must be above 2.8, and the solution is basic.     the pH of the solution must be above 2.8, and the solution is acidic.     the solution is basic, and the pH must be at or below 1.2.     the pH of the solution is above 2.8, and the solution could be acidic, neutral or basic.     the solution is acidic, and the pH must be at or below 1.2.