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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 Answer

1 vote

Answer:

1) pH = 1.0

2) pOH = 6.09

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

Step-by-step 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

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