The solubility of sodium chloride (NaCl) in water is 36.2 g NaCl per 100 g water at 25°C. Which describes a solution of 29.5 g NaCl in 75.0 g water at 25°C?

an unsaturated solution

a saturated solution with all sodium chloride dissolved

a supersaturated solution

a saturated solution with excess sodium chloride undissolved

A saturated solution with excess sodium chloride undissolved

Explanation:

Hello,

In this case, since 32.6 g of sodium chloride are completely dissolved in 100 g of water at 25 °C, we can propose a rule of three to compute the grams of sodium chloride which are completely dissolved but in 75.0 g of water as shown below:

For that reason, since 29.5 g of sodium chloride are attempted to be dissolved, the following amount will remain undissolved:

Thus, since the undissolved amount is low we can conclude it is a saturated solution with excess sodium chloride undissolved since 2.35 g will remain undissolved.

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