   Chapter 4, Problem 112GQ

Chapter
Section
Textbook Problem

A solution of hydrochloric acid has a volume of 250. mL and a pH of 1.92. Exactly 250. mL of 0.0105 M NaOH is added. What is the pH of the resulting solution?

Interpretation Introduction

Interpretation:

pH of the solution obtained by adding given volume of HCl with given volume of NaOH under given pH condition has to be determined.

Concept introduction:

• Strong acids dissociates completely into ions in solution but weak acids do not.
• pH of a solution is the negative of the base -10 logarithm of the hydronium ion concentration.

pH=-log[H3O+]

• Concentration of hydronium ion [H3O+]=10-pH
• For an acidic solution pH<7 and for a basic solution pH>7.
• Amountofsubstance=Concnetrationofthesubstance×Volume
• Concnetrationofthesubstance=AmountofsubstanceVolume
Explanation

In the given solution of HCl has a volume of 250.mL and a pH of 1.92

From its pH value Concentration of hydronium ion can be determined using the formula,

Concentration of hydronium ion [H3O+]=10-pH

The pH of the given solution is 1.92. Substituting this value in the above equation,

Concentration of hydronium ion is,

[H3O+]=10-1.92 =0.012M

Amount of HCl in 250.mL of 0.012M solution can be calculated as follows,

AmountofHCl =ConcnetrationHCl×VolumeHCl =0.012molL×0.25L =0.003molHCl

Similarly the amount of NaOH in 250.mL of 0.0105M solution can be calculated.

AmountofNaOH =ConcnetrationNaOH×VolumeNaOH =0

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Behavior change is a process that takes place in stages. T F

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What is optimal foraging?

Biology (MindTap Course List)

Most codons, specify a(n) ___ . a. protein b. polypeptide c. amino acid d. mRNA

Biology: The Unity and Diversity of Life (MindTap Course List)

A body cavity fully lined with tissue derived from mesoderm is called a(n) _____.

Biology: The Unity and Diversity of Life (MindTap Course List) 