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At 27°C, 58.5g of sodium chloride is present in 250cm$$^3$$ of a solution. The sol...

Question

At 27°C, 58.5g of sodium chloride is present in 250cm$$^3$$ of a solution. The solubility of sodium chloride at this temperature is?

(molar mass of sodium chloride = 111.0gmol$$^{-1}$$)

Options

A) 2.0 moldm$$^{-3}$$

B) 0.25 moldm$$^{-3}$$

C) 1.0 moldm$$^{-3}$$

D) 0.5 moldm$$^{-3}$$

The correct answer is A.

Explanation:

Given the Mass of the salt = 58.5g
Volume = 250 cm$$^3$$ = 0.25 dm$$^3$$
Mass concentration = $$\frac{Mass}{Volume}$$
= $$\frac{58.5}{0.25}$$ = 234 gdm$$^{-3}$$
Solubility (in moldm$$^{-3}$$ = $$\frac{234}{111}$$
= 2.11 moldm$$^{-3}$$
$$\approxeq$$ 2.0 moldm$$^{-3}$$

Dicussion (1)

• Given the Mass of the salt = 58.5g
Volume = 250 cm$$^3$$ = 0.25 dm$$^3$$
Mass concentration = $$\frac{Mass}{Volume}$$
= $$\frac{58.5}{0.25}$$ = 234 gdm$$^{-3}$$
Solubility (in moldm$$^{-3}$$ = $$\frac{234}{111}$$
= 2.11 moldm$$^{-3}$$
$$\approxeq$$ 2.0 moldm$$^{-3}$$