Question

4. (5 pts) Explain if pH of solution will increase, no change, or decrease) if: - add solid ammonium nitrate to 0.02 M nitric acid - add 1.0 g of sodium hydroxide to 100.0 mL of 1.0 M acetic acid - add 1.0 g of sodium chloride to 100.0 mL of 0.01 M HCI - add 1.0 mL of 0.10 M HCl to 20.0 mL of 0.01 M ammonia - add 0.1 g of NaOH to 100.0 L of distilled water

Answer 1

1) no change .

on addition of NH4NO3 to HNO3 there is no change in pH . because HNO3 is the strong acid and NH4NO3 is the weak acid.

2) increases

addition of NaOH to acid. some of the acid will neutralize so acid amount decreases that indicates increase pH

3) no change

NaCl is the neutral salt on adding this salt to either acid or base there is no change in pH value.

4) decrease

NH3 is base . initially it has more pH . on addition of HCl to NH3 basic nature decreases as a results pH decreases

5) increases

distil water initial pH is 7.00. on adding NaOH to the water basic nature will come into the water so pH increases