What is the ph of a solution with [h3o+] of 9.1 x 10-2 m?
what is the poh of a solution at 25 oc when the ph is 7.91?
which of the following is acidic at 25 oc? check all that apply.
poh = 9.26
poh = 8.88
poh = 6.45
ph = 1.22
ph = 9.41

1) pH = 1.0

2) pOH = 6.09

3) pOH = 9.26  ; pOH = 8.88  ; pH = 1.22

Explanation:

1) What is the pH of a solution with [H₃O⁺] of 9.1 x 10⁻² M?

pH = -log ( [H₃O⁺] ) = - log  (9.1 x 10⁻²) = 1.0

2) What is the pOH of a solution at 25 °C when the pH is 7.91?

pH + pOH = 14

pOH = 14 - pH = 14 - 7.91 = 6.09

3) Which of the following is acidic at 25 °C?

A solution is acidic when the pH is below 7

pOH = 9.26  → pH = 4.72 ACIDIC

pOH = 8.88  → pH = 5.12 ACIDIC

pOH = 6.45  → pH = 7.55

pH = 1.22  ACIDIC

pH = 9.41