Percentage solution
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In biology percentage solutions are often preferred to molar ones. A 1% solution would have 1 g of solute to 100 ml of solvent. This would be labelled as a weight/volume [w/v] percentage solution. For w/w, both solvent and solute would need to be weighed in the required ratios. Volume would accordingly be measured using a measuring cylinder, volumetric flask, pipette or similar. Labels should show what the percentage relationships are.
Percentage solutions are by their nature imprecise. They are used when exact concentrations are not necessary.