   Chapter 15, Problem 15.73QP General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
ISBN: 9781305580343

Solutions

Chapter
Section General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
ISBN: 9781305580343
Textbook Problem

A solution of washing soda (sodium carbonate, Na2CO3) has a hydroxide-ion concentration of 0.0040 M. What is the pH at 25°C?

Interpretation Introduction

Interpretation:

The pH for the given hydroxide ion concentrations has to be determined.

Concept introduction:

pH is an logarithmic expression to express a solution is acidic, basic or neutral.  pH scale lies values between 1-14 and on which 7 is neutral, below 7 values are more acidic in nature and above 7 values are more basic in nature.

First, we have to calculate the concentration of hydronium ion by using the following formula.

[H3O+] = Kw ÷[OH

The pH is equal to -log10c

Where, c is hydrogen ion concentration in moles per liter.

Explanation

The given hydroxide concentration is 4.83 ×10-11M

Substitute this value in the above formula and do some mathematical calculations then we get final answer as follows.

[H3O+] = Kw ÷[OH

[H3O+] = (1

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