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Chapter 6: Q14 P (page 142)

Find $[Cu *]$ in equilibrium with CuBr(s) and 0.10MB $r^{-}$ .

Short Answer

Expert verified

The $[{Cu}^{+}]$ was calculated as role="math" localid="1663330959468" $5 \times 10^{- 8} M$ .

Step by step solution

01

The concept used.

Solubility Product:

The solubility product is a kind of equilibrium constant whose value depends on temperature.

02

The concentration

For given data, the equilibrium reaction is:

$CuBr (s) ⇌ {Cu}^{+} + {Br}^{-}$

The

$\begin{array}{l} [C u^{+}] [B r^{-}] = K_{s p} \\ [C u^{+}] [0.10] = 5 \times 10^{- 9} M \end{array}$

Therefore,

$\begin{array}{l} [{Cu}^{+}] = \frac{5 \times 10^{- 8} M}{0.10} \\ [{Cu}^{+}] = 5 \times 10^{- 8} M \end{array}$

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Most popular questions from this chapter

The formation of tetrafluoroethylene from its elements is highly exothermic:

$\underset{Fluorine}{2 F_{2}} (g) + \underset{Graphite}{2 C (s)} ⇌ \underset{Tetrafluoroethylene}{F_{2} C = {CF}_{2} (g)}$

(a)If a mixture of $F_{2}$ graphite, and $C_{2} F_{4}$ is at equilibrium in a closed container, will the reaction go to the right or to the left if $F_{2}$ is added?

(b) Rare bacteria from the planet Teflon eat $C_{2} F_{4}$ and make Teflon for their cell walls. Will the reaction go to the right or to the left if these bacteria are added?

(c) Will the reaction go right or left if solid graphite is added? (Neglect any effect of increased pressure due to the decreased volume in the vessel when solid is added.)

(d) Will the reaction go right or left if the container is crushed to one-eighth of its original volume?

(e) Does the equilibrium constant become larger or smaller if the container is heated?

${BaCl}_{2} ? H_{2} O (s)$ loses water when it is heated in an oven:

${BaCl}_{2} \cdot H_{2} O (s) ⇌ {BaCl}_{2} (s) + H_{2} O (g)$

${ΔH}^{°} = 63.11 kJ / mol at 25^{°} C$

${ΔS}^{°} = + 148 J / (K \cdot mol) at 25^{°} C$

a) Write the equilibrium constant for this reaction. Calculate the vapour pressure of gaseous $H_{2} O (P_{H_{2} O})$ above ${BaCl}_{2} \cdot H_{2} O$ at 298K.

(b) If $∆ H °$ and $∆ S °$ are not temperature dependent (a poor assumption), estimate the temperature at which $P_{H_{2} O}$ above ${BaCl}_{2} \cdot H_{2} O (s)$ will be 1 bar.

A solution contains $0.0500 {MCa}^{2 +}$ and $0.0300 {MAg}^{+}$ . Can 99%of ${Ca}^{2 +}$ be precipitated by sulphate without precipitating ${Ag}^{+}$ ? What will be the concentration of ${Ca}^{2 +}$ when ${Ag}_{2} {SO}_{4}$ begins to precipitate?

Write the $K_{b}$ reaction for pyridine and for sodium 2-mercaptoethanol.

For the reaction ${Li}^{+} + H_{2} O ⇌ Li (OH) (aq) + H^{+}, K_{L} i = 2.3 \times 10^{- 14}$ . Combine this reaction with the reaction to find the equilibrium constant for the reaction ${Li}^{+} + {OH}^{-} ⇌ Li (OH) (aq) .$

See all solutions

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