Exercise 15.55 For each strong acid solutions, determine [H3O+],[OH], and pH. Pa

Question

Exercise 15.55

For each strong acid solutions, determine [H3O+],[OH], and pH.

Part A

0.23 M HCl

Enter your answers numerically separated by a comma. Express your answer using two significant figures.

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Part B

Express your answer to two decimal places.

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Part C

2.6×102 M HNO3

Enter your answers numerically separated by a comma. Express your answer using two significant figures.

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Part D

Express your answer to two decimal places.

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Part E

a solution that is 5.6×102 M in HBr and 2.3×102 M in HNO3

Enter your answers numerically separated by a comma. Express your answer using two significant figures.

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Part F

Express your answer to two decimal places.

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Part G

a solution that is 0.815% HNO3 by mass (Assume a density of 1.01 g/mL for the solution.)

Enter your answers numerically separated by a comma. Express your answer using three significant figures.

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Part H

Express your answer to three decimal places.

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Exercise 15.55

For each strong acid solutions, determine [H3O+],[OH], and pH.

Part A

0.23 M HCl

Enter your answers numerically separated by a comma. Express your answer using two significant figures.

Explanation / Answer

part A)

HCl is strong acid so [HCl] = [H3O+]

[H3O+] = 0.23 M

[OH-] = 1.0 x 10-14  / 0.23

[OH-] = 4.35 x 10-14 M

part B)

pH = - log [H3O+]

pH = - log [0.23]

pH = 0.64

part C)

2.6 x 10-2 M HNO3

[HNO3] = [H3O+]

[H3O+] = 2.6 x 10-2 M

[OH-] = 1.0 x 10-14 / 2.6 x 10-2

[OH-] = 3.85 x 10-13 M

part D)

pH = - log [H3O+]

pH = -log [2.6 x 10-2]

pH = 1.58

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