Chapter 9: Q8P (page 208)

Find theand concentrations of ${({CH}_{3})}_{3} N$ and ${({CH}_{3})}_{3} {NH}^{+}$ in $0.060 M$ trimethylammonium chloride.

Short Answer

Expert verified

$pH = 5.51$

Concentration of

$[{({CH}_{3})}_{2} N] = [H^{+}] = 3.09 \times 10^{- 0} [{({CH}_{3})}_{2} {NH}^{+}] = 0.060 M$

Step by step solution

Step: Definition of pH

pH is defined as a quantitative measure of acidity and basicity. Compounds having pH more than 7 is acidic in nature while pH when shown above than 7 is basic in nature. When pH comes 7 , compound is said to be neutral.

Step: Consider the reaction of disassociation.

${({CH}_{3})}_{3} {NH}^{+} \overset{}{⇌} {({CH}_{3})}_{3} N + H^{+} [{({CH}_{3})}_{3} {NH}^{+}] = 0.060 - x [{({CH}_{3})}_{3} N] = [H^{+}] = x$

The value of $K_{a} = 1.59 \times 10^{- 10}$

Calculate x value.

The value of x can be calculated as follows:

$K_{a} = \frac{x^{2}}{0.060 - x} pH = - \log [H^{+}] = - \log (3.09 \times 10^{- 6}) = 5.51$

Calculate pH

$pH = - \log [H^{+}] = - \log (3.09 \times 10^{- 6}) = 5.51$

Concentration of [CH33 NH+].

$[{({CH}_{3})}_{3} {NH}^{+}] = 0.060 - x [{({CH}_{3})}_{3} {NH}^{+}] = 0.060 - (3.09 \times 10^{- 6}) [{({CH}_{3})}_{3} {NH}^{+}] = 0.060 M$

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Find theand concentrations of ${({CH}_{3})}_{3} N$ and ${({CH}_{3})}_{3} {NH}^{+}$ in $0.060 M$ trimethylammonium chloride.

Short Answer

Step by step solution

Step: Definition of pH

Step: Consider the reaction of disassociation.

Calculate x value.

Calculate pH

Concentration of [CH33 NH+].

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Find theand concentrations of (CH3)3Nand (CH3)3NH+in 0.060Mtrimethylammonium chloride.

Short Answer

Step by step solution

Step: Definition of pH

Step: Consider the reaction of disassociation.

Calculate x value.

Calculate pH

Concentration of [CH33 NH+].

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Organic Chemistry

Chemical Analysis

The Earths Atmosphere

Chemistry Branches

Kinetics

Ionic and Molecular Compounds

Study anywhere. Anytime. Across all devices.

Find theand concentrations of ${({CH}_{3})}_{3} N$ and ${({CH}_{3})}_{3} {NH}^{+}$ in $0.060 M$ trimethylammonium chloride.