Question

12.5 mL of 0.280 M HNO3 and 5.0 mL of 0.920 M KOH are mixed. Is the resulting solution acidic, basic or neutral?

Answer 1

Answer:

The resulting solution is basic.

Explanation:

The reaction that takes place is:

• HNO₃ + KOH → KNO₃ + H₂O

First we calculate the added moles of HNO₃ and KOH:

• HNO₃ ⇒ 12.5 mL * 0.280 M = 3.5 mmol HNO₃

• KOH ⇒ 5.0 mL * 0.920 M = 4.6 mmol KOH

As there are more KOH moles than HNO₃, the resulting solution is basic.