Determine the pH for the following solutions: [H3O+]=4.1×10−8M Express your answer using two decimal places.   [H3O+]=4.2×10−2M Express your answer using two decimal places.   [OH−]=5.2×10−4M Express your answer using two decimal places.   [OH−]=0.004M Express your answer using one decimal place.

General, Organic, and Biological Chemistry
7th Edition
ISBN:9781285853918
Author:H. Stephen Stoker
Publisher:H. Stephen Stoker
Chapter10: Acids, Bases, And Salts
Section: Chapter Questions
Problem 10.106EP: Arrange the following 0.10 M aqueous solutions in order of increasing pH: HF, NaF, HNO3, and NaNO3.
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Determine the pH for the following solutions:

[H3O+]=4.1×10−8M
Express your answer using two decimal places.
 
[H3O+]=4.2×10−2M
Express your answer using two decimal places.
 
[OH−]=5.2×10−4M
Express your answer using two decimal places.
 
[OH−]=0.004M
Express your answer using one decimal place.

 

Expert Solution
Step 1

(1)

The pH of any solution can be determined by using the given below formula for pH :

pH = -log[H3O+]

So, for [H3O+]=4.1×10−8M

pH = -log[4.1×10−8]

pH = -(-7.387) = 7.39

Hence, the pH of the solution is 7.38.

 

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