Part A [OH] = 5.1×10 11 M Express your answer using two significant figures. Sub

Question

Part A

[OH] = 5.1×1011 M

Express your answer using two significant figures.

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Part B

Classify this solution as acidic or basic.

Classify this solution as acidic or basic.

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Part C

[OH] = 5.0×109 M

Express your answer using two significant figures.

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Part D

Classify this solution as acidic or basic.

Classify this solution as acidic or basic.

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Part E

[OH] = 5.6×104 M

Express your answer using two significant figures.

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Part F

Classify this solution as acidic or basic.

Classify this solution as acidic or basic.

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Part G

[OH] = 5.5×102 M

Express your answer using two significant figures.

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Part H

Classify this solution as acidic or basic.

Classify this solution as acidic or basic.

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Explanation / Answer

Part A.

Kw = [H3O+] [OH-] = 1.0 x 10-14 M

[H3O+] = 1.0 x 10-14/ [OH-]

[H3O+] = 1.0 x 10-14/ 5.1 x 10-11

[H3O+] = 1.96 x 10-4M

Part B

pH = -log [H3O+]

pH = -log 1.96 x 10-4

pH = 3.7

So the solution is Acidic

Part C

[H+] [OH-] = 1.0 x 10-14 M

[H+] = 1.0 x 10-14/ [OH-]

[H+] = 1.0 x 10-14/ 5.0 x 10-9

[H+] = 2 x 10-6 M

Part D

pH = -log [H+]

pH = 5.7

So the solution is Acidic

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