Question

1.

When HNO₃ (flask) is titrated with KOH (burette), which response best describes the equivalence point?

Group of answer choices

A) The pH > 7 since there is a strong base present.

B) The pH = 7 since it has the same moles of acid and base present.

C) The pH < 7 since there is a strong acid present.

D) The pH < 7 since the conjugate acid would be present.

E) The pH > 7 since the conjugate base would be present.

2.

When HCOOH (flask) is titrated with NaOH (burette), which response best describes the pH at the equivalence point?

Group of answer choices

A) The pH < 7 since the conjugate acid would be present.

B) The pH > 7 since the conjugate base would be present.

C) The pH > 7 since there is a strong base present.

D) The pH = 7 since it has the same moles of acid and base present.

E) The pH < 7 since there is a strong acid present.

Answer 1

1)
HNO3 is strong acid and KOH is strong base.
So, at the equivalence point, the solution would be neutral and pH would be 7.00
Answer: B

2)
HCOOH is weak acid.
NaOH is strong base.

At equivalence point equal mol of both will react to form HCOO-.
HCOO- is conjugate base and hence pH would be greater than 7
Answer: B