Calculate the pH of each solution. Part A [OH] = 9.9×10 7 M Express your answer

Question

Calculate the pH of each solution.

Part A

[OH] = 9.9×107 M

Express your answer using two decimal places.

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Part B

[OH] = 3.6×108 M

Express your answer using two decimal places.

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Part C

[OH] = 9.2×1011 M

Express your answer using two decimal places.

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Part D

[OH] = 1.5×102 M

Express your answer using two decimal places.

Calculate the pH of each solution.

Part A

[OH] = 9.9×107 M

Express your answer using two decimal places.

pH =

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Part B

[OH] = 3.6×108 M

Express your answer using two decimal places.

pH =

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Part C

[OH] = 9.2×1011 M

Express your answer using two decimal places.

pH =

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Part D

[OH] = 1.5×102 M

Express your answer using two decimal places.

pH =

Explanation / Answer

A)
pOH = -log[OH-]
= -log(9.9*10^-7)
= 6.01
pH = 14-pOH
= 14-6.01
= 7.99
B)
pOH = -log[OH-]
= -log(3.6*10^-8)
= 7.44
pH = 14-pOH
= 14-7.44
=6.56
C)
pOH = -log[OH-]
= -log(9.2*10^-11)
= 10.1
pH = 14-pOH
= 14-10.1
= 3.9
D)
pOH = -log[OH-]
= -log(1.5*10^-2)
= 1.8
pH = 14-pOH
= 14-1.8
= 12.2

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