Q19.25P What is the component concentrat... [FREE SOLUTION]

Chapter 19: Q19.25P (page 873)

What is the component concentration ratio, $[B r O^{-}] / [H B r O]$ ,of a buffer that has a pH of7.95( $K_{a}$ of $H B r O = 2.3 脳 10^{- 9}$ )?

Short Answer

Expert verified

The component concentration ratio obtained is $\frac{{[BrO}^{-}]}{[HBrO]} = 0.20$

Step by step solution

Buffer solution

A buffer solution withstands the change in a pH value. An acidic buffer is formed by combining a weak acid and the salt of its conjugate base.

Evaluate the component concentration ratio

Write theHBrOdissociation reaction first.

${HBrO +H}_{2} O 鈬� H_{3} O^{+} {+ BrO}^{-} .$

We must alter the Henderson-Hasselbalch equation to find $\frac{{[BrO}^{-}]}{[HBrO]}$ .

The pH and $K_{a}$ are known. Therefore, first solve for the ${pK}_{a}$ .

${pK}_{a} {= - logK}_{a} {= - log(2.3脳10}^{- 9}) = 8.64$

Then, solve for $\frac{{[BrO}^{-}]}{[HBrO]}$ using the Henderson-Hasselbalch equation as:

${pH = pK}_{a} + log \frac{{[BrO}^{-}]}{[HBrO]} log \frac{{[BrO}^{-}]}{[HBrO]} {= pH - pK}_{a} \frac{{[BrO}^{-}]}{[HBrO]} {= 10}^{{pH - pK}_{a}} {= 10}^{7.95 - 8.64} = 0.20.$

Therefore, thecomponent concentration ratio obtained is $\frac{{[BrO}^{-}]}{[HBrO]} = 0.20$ .

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What is the component concentration ratio, $[B r O^{-}] / [H B r O]$ ,of a buffer that has a pH of7.95( $K_{a}$ of $H B r O = 2.3 脳 10^{- 9}$ )?

Short Answer

Step by step solution

Buffer solution

Evaluate the component concentration ratio

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91影视

What is the component concentration ratio, [BrO-]/[HBrO],of a buffer that has a pH of7.95(KaofHBrO=2.3脳10-9)?

Short Answer

Step by step solution

Buffer solution

Evaluate the component concentration ratio

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Making Measurements

Chemistry Branches

The Earths Atmosphere

Physical Chemistry

Ionic and Molecular Compounds

Organic Chemistry

Study anywhere. Anytime. Across all devices.

What is the component concentration ratio, $[B r O^{-}] / [H B r O]$ ,of a buffer that has a pH of7.95( $K_{a}$ of $H B r O = 2.3 脳 10^{- 9}$ )?