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yuradex [85]
3 years ago
5

What mass (g) of potassium chloride is contained in 430.0 mL of a potassium chloride solution that has a chloride ion concentrat

ion of 0.193 M?​
Chemistry
1 answer:
fredd [130]3 years ago
8 0

Answer:

6.178 g.

Explanation:

  • KCl is ionized in the solution as:

<em>KCl → K⁺ + Cl⁻.</em>

<em></em>

∴ [KCl] = [K⁺] = [Cl⁻] = 0.193 M.

<em>Molarity is defined as the no. of moles of the solute per 1.0 L of the solution.</em>

<em />

∵ M = [(mass/molar mass)KCl][(1000)/(V of the solution)].

<em>∴ mass of KCl = (M)(molar mass of KCl)(V of the solution)/1000</em> = (0.193 M)(74.55 g/mol)(430.0 mL)/1000 = <em>6.178 g.</em>

<em></em>

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