From the following formula, calculate the quantities required to make 5 lb. of hydrophilic ointment. Methylparaben                           0.25 g Propylparaben                            0.15 g Sodium lauryl sulfate                   10 g Propylene glycol                         120 g Stearyl alcohol                            250 g White petrolatum                     250 g Purified water, ad                    1000 g ANSWER: 0.568 g methylparaben 0.341 g propylparaben 22.7 g sodium lauryl sulfate 272.4 g propylene glycol

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.