# A "standard solution" is "aqueous", "unsaturated", "a mother solution"?

Jun 1, 2017

None of your options is satisfactory........

#### Explanation:

A solution of known concentration, may be $\text{aqueous}$; it may be $\text{unsaturated}$; it may be a $\text{mother solution}$ from which prepare various dilutions. You do know the solution $\text{concentration}$, i.e.

$\text{Concentation"="Moles of solute"/"Volume of solution}$.....

and typically we report the concentration with units of $m o l \cdot {L}^{-} 1$.

Jun 1, 2017

Should be "Standard solution", shouldn't it?

#### Explanation:

None of the other possible answers work.

"Normal" means unit gram equivalent mass of solute per litre of solution.

"Aqueous" just means that the solvent is water.

"Original" means that a solution used to prepare other solutions by dilution.

"Unsaturated" means that the amount of solute dissolved is below the maximum amount that can be dissolved per unit volume.

"Standard solution" = a solution that contains a precisely known concentration of solute (in analytical terms anyway).