Q. 9.91 - An Introduction to General, Organic, and Biological Chemistry

Question

If $NaCl$ has a solubility of $36.0 g in 100 g$of $H_{2}O at 100°C$. how many grams of water are needed to prepare a saturated solution containing $80.0 g$ of $NaCl$? $(9.3)$

Step-by-Step Solution

Answer

As the concluded, make a saturated solution with$80.0 g NaCl at 20°C, 222 g$ water is needed.

Step 1: Introduction.

A solvent is one in which there is far too much solute that adding more would cause it to dissolve.

Step 2: Given data.

$36.0 g$ of solid $NaCl$ is decomposed in $100 g$ of water to make a supersaturation of $NaCl at 20°C$.

In $(100/36) g$of water, $1 g$ of solid $NaCl$ is digested.

Step 3: Explanation.

Estimate how much water is required to make $80.0 g of NaCl.$

$=\frac{100 g}{36 g}\times 80 g$

$=222 g$

To make a saturated solution holding $80.0 g NaCl$ at $20°C, 222 g$ water is required.