Chapter 19: Q19.115CP (page 876)

It is possible to detect NH₃gas over $10^{- 2} {M NH}_{3}$ . To what must be raised to form detectable ${NH}_{3}$ ?

Short Answer

Expert verified

The deduction of $0.01 M$ from $0.15 M$ since that's the amount needed to make ${NH}_{3}$ .

Step by step solution

Concept introduction

Ammonia, with the chemical formula NH3, is a colorless, pungent-smelling gas made up of nitrogen and hydrogen. Anhydrous ammonia is a highly pure form of ammonia that contains very little water. Under pressure, ammonia gas can be compressed into a liquid.

Calculation to form detectable NH3

$c ({NH}_{3}) = 10^{- 2} M c ({NH}_{4} Cl) = 0.15 M$

We only need to utilize the Henderson-Hasselbalch equation to solve this problem:

$Kw = K_{a} \times K_{b} 1 \times 10^{- 14} = K_{a} \times 1.8 \times 10^{- 5} K_{a} = \frac{1 \times 10^{- 14}}{1.8 \times 10^{- 5}}$

role="math" localid="1663675175585" $pH = pKa + \log \frac{[A^{-}]}{[HA]} pH = - \log \frac{1 \times 10^{- 14}}{1.8 \times 10^{- 5}} + \log \frac{1 \times 10^{- 2} M}{0.15 M - 0.01 M}$

Therefore, we deduct role="math" localid="1663675221838" $0.01 M$ from $0.15 M$ since that's the amount needed to make ${NH}_{3}$ $pH = 8.11$ .

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It is possible to detect NH₃gas over $10^{- 2} {M NH}_{3}$ . To what must be raised to form detectable ${NH}_{3}$ ?

Short Answer

Step by step solution

Concept introduction

Calculation to form detectable NH3

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It is possible to detect NH3gas over 10- 2M NH3. To what must be raised to form detectable NH3 ?

Short Answer

Step by step solution

Concept introduction

Calculation to form detectable NH3

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Chemical Analysis

Making Measurements

Inorganic Chemistry

Nuclear Chemistry

Organic Chemistry

Kinetics

Study anywhere. Anytime. Across all devices.

It is possible to detect NH₃gas over $10^{- 2} {M NH}_{3}$ . To what must be raised to form detectable ${NH}_{3}$ ?