Question

How many mg of methylparaben are required to prepare 8 fl. oz. of a solution containing 0.12% w/v of methylparaben?​

Answer 1

8.5 mg is required for it

Answer 2

283.87 mg of grams methylparaben is needed

Explanation:

• Ratio strength may also be written as weight-in-volume (w/v) which expresses the number of grams of a solid substance by volume inmLof preparation.
• For a preparation that has a ratio strength of 1:1000 (w/v), this represents 1 g of a solid substance dissolved or dispersed in 1000 mL of the liquid preparation

• Ratio strength may also be written as volume-in-volume (v/v) which expresses the number of milliliters of a liquid substance by volume inmLof preparation.

Volume (mL) (representing in grams) X % (expressed as a decimal)

= gram of solute.