Question

1. If the pH is 7.83, what is the hydrogen ion concentration? (Express your answer using...

1. If the pH is 7.83, what is the hydrogen ion concentration? (Express your answer using the correct number of significant figures.)

2. How many significant figures can be determined when obtaining ~5 mL of solution using a 10-mL

graduated cylinder?

3. Calculate the pH of a 0.0988 M H + solution. Express your answer in the correct number of significant

figures.

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Homework Answers

Answer #1

1. If the pH is 7.83, what is the hydrogen ion concentration? (Express your answer using the correct number of significant figures.)

pH = - log [H+]

[H+] = 10^-pH

[H+] = 10^-7.83

[H+] = 1.48*10^-8

2. How many significant figures can be determined when obtaining ~5 mL of solution using a 10-mL

graduated cylinder?

To determined ~5 mL of solution using a 10-mL graduated cylinder we find 1 significant figure; which is 5.

3. Calculate the pH of a 0.0988 M H + solution. Express your answer in the correct number of significant

figures.

pH = - log [H+]

pH = - log [0.0988 ]

pH = 1.01

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