Question

State whether each of the following refers to a saturated or an unsaturated solution:

a. A crystal added to a solution does not change in size.

b. A sugar cube completely dissolves when added to a cup of coffee.

c. A uric acid concentration of $4.6mg/100mL$in the kidney does not cause gout.

Short answer

(part a) The size of a crystal added to a solution remains constant. Then, the solution is Saturated.

(part b) A sugar cube completely dissolves when added to a cup of coffee. Therefore, the solution is unsaturated.

(part c) A uric acid concentration of $4.6mg/100mL$in the kidney does not cause gout and hence the reaction is unsaturated.

Step-by-step solution

Introduction (part a).

An unsaturated solution is one that does not contain the same amount of solute but readily disperses more salt solution when added to the solvent.

A saturated sample containing the concentration of a substance but it does not disband any additional solute at the specified temperature.

When a crystal is introduced into a solution, its size remains constant.

Given Information (part a). 

Given:

Adding a crystal to the solution has no effect on its size because it is saturated and contains the saturated solution.

Explanation (part a).  

When a sugar cube is added to a cup of coffee, it completely dissolves.

Given Information (part b). 

Given:

When a sugar cube is added to a cup of coffee, it totally dissolves because of solution is unsaturated as well as freely melts more solute.

Explanation (part b). 

Gout is just not characterized by the accumulation of uric acid in the kidney.

Given Information (part c).

Given:

A uric acid concentration of$4.6mg/100mL$ in the kidney does not cause gout.

Explanation (part c).

At ${37}^{\circ }C,$the dissolution rate of uric acid in plasma proteins is$7mg/100mL.$ As an outcome, a uric acid density in the kidney of$4.6mg/100mL$ makes reference to an unsaturated solution but does not cause gout.