An unknown solution has a ph of 6.8. which of these chemicals is likely to increase the ph the most when added to the solution? a. naoh b. hcl c. nh3 d. hno3

A. NaOH.

Explanation:

The pH  of the solution = 6.8.

So, NaOH and NH₃ "bases" will increase the pH of the solution.

while, HCl and HNO₃ "acids" will increase the acidity of the solution, thus pH will decrease.

But, NaOH will increase the pH of the solution the most because it is dissociates completely to OH⁻ , while NH₃ is weakly ionized "does not dissociate completely".

So, NaOH will increase the pH the most when added to the solution.

NaOH

Explanation:

the product of the pressure and volume is also constant