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Chapter 9: Q. 9.100 (page 318)

What is the molarity of a solution containing $15.6 g o f K C l$ in $274 m L o f K C l$ solution? $(9.4)$

Short Answer

Expert verified

The optimizer molarity is $0.77 M K C l .$

Step by step solution

01

Given information

Given $15.6 g K C l$ in a solution of $274 m L = 0.274 .$

Molarity (moles/L) is required.

Compute molarity using the moles of $K C l$ and the quantity of the solution in litres.

$M o l a r i t y (M) = \frac{m o l e s o f s o l u t e}{l i t e r s o f s o l u t i o n}$

$GKCl Molar mass = \frac{moles K C l}{volume (L)} = M K C l solution$

02

Explanation.

Factors,

$1 m o l e K C l = 74.6 g K C l$

$\frac{1 m o l e K C l}{74.6 g K C l} a n d \frac{74.6 g K C l s s s s}{1 m o l e K C l}$

Equation,

$m o l e s K C l = 15.6 g m L 脳 \frac{1 m o l e K C l}{74.6 g m L} = 0.21 m o l e s K C l$

Divide the molecules of KCl even by quantity in litres to get the molarity.

$M o l a r i t y = \frac{0.21 m o l e s K C l}{0.274 L} = 0.77 M K C l$

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Most popular questions from this chapter

Classify the solute represented in each of the following equations as a strong, weak, or nonelectrolyte:

a. $K_{2} {SO}_{4} (s) \overset{H_{2} O}{鉄�} 2 K^{+} (a q) + {SO}_{4}^{2 -} (a q)$

b. ${NH}_{3} (g) + H_{2} O (l) 鈬� {NH}_{4}^{+} (a q) + {OH}^{-} (a q)$

c. $C_{6} H_{12} O_{6} (s) \overset{H_{2} O}{鉄�} C_{6} H_{12} O_{6} (a q)$

Indicate whether aqueous solutions of each of the following solutes contain only ions, only molecules, or mostly molecules and a few ions:

a. $N H_{4} C l$ , a strong electrolyte.

b. ethanol, $C_{2} H_{6} O$ , a nonelectrolyte.

c. $H C N$ , hydrocyanic acid, a weak electrolyte.

Describe the formation of an aqueous $L i B r$ solution, when solid $L i B r$ dissolves in water.

A bottle of champagne is $11 % (v / v)$ alcohol. If there are $750 m L$ of champagne in the bottle, what is the volume, in milliliters, of alcohol?

Water is a polar solvent and carbon tetrachloride $(C C l_{4})$ is a nonpolar solvent. In which solvent is each of the following, which is found or used in the body, more likely to be soluble?

a. $C a C O_{3}$ (calcium supplement), ionic

b. retinol (vitamin A), nonpolar

c. sucrose (table sugar), polar

d. cholesterol (lipid), nonpolar

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