Question

What is true about a solution of 1.0 M HF? HF has a higher [OH-] than a solution of 1.0 M HCl. HF has a lower pH than a solution of 1.0 M HCl. HF has the same pH as a 1.0 M solution of 1.0 M HCl. HF has a higher [H3O+] than a solution of 1.0 M HCl.

Answer 1

HF has a higher [OH-] than a solution of 1.0 M HCl. is the answer

Answer 2

Answer:

HF has a higher [OH-] than a solution of 1.0 M HCl.

Explanation:

HF is a weak acid. It will be weakly dissociated to give hydrogen ions.

HCl is a strong acid. It will dissociate almost completely so will give more hydrogen ions as compared to HF.

So

a) 1.0 M HF will have lower H₃O⁺ as compared to 1.0 M of HCl.

b) Due to less H₃O⁺ of HF,it will have higher pH as compared to HCl.

c) The product of concentration of H₃O⁺ and OH⁻ is constant at a constant temperature. So if a solution has lower H₃O⁺ as compared to other solution (HCl), it will have higher concentration of OH⁻.

Thus HF has higher OH⁻ concentration than a solution of HCl, of same concentration.