Interpretation: The changes that will occur if the saturated solution of sodium nitrate is cooled are to be explained.
Concept introduction:
A solution that contains the maximum amount of solute and in which no further amount of solute can be dissolved at a particular temperature is called a saturated solution.
Answer to Problem 51A
If a saturated solution of sodium nitrate is cooled, then crystals of sodium nitrate will be formed.
Explanation of Solution
Temperature effects on the solubility of a solution:
With the increase in temperature, the intermolecular distance between solvent molecules increases, and therefore solubility of a solute increase in the solution.
With the decrease in temperature, the intermolecular distance between solvent molecules decreases, and therefore solubility of a solute also decreases.
A saturated solution of sodium nitrate means that in the solution no further sodium nitrate can be added.
As it is cooled, then the temperature of the solution decreases, and also the solubility of the solute (sodium nitrate) decreases.
As a result, crystals of sodium nitrate will be formed because as the solubility decreases excess of solute dissolved separates in the form of crystals.
Therefore, when the saturated solution is cooled the crystals will be formed.
The crystals of sodium nitrate will be formed.
Chapter 16 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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