Estimate the amount of Alcohol USP required to preserve the following solution: 100 ml of syrup...
Estimate the amount of Alcohol USP required to preserve the following solution:
100 ml of syrup containing
10 g of sucrose
10 ml of propylene glycol
Homework Answers
Given
Volume of preserved sucrose :10g (10g×0.53ml/g) = 5.3 ml
Volume occupied by sucrose is also 10g (10g×0.647 ml/g)=6.47 ml
Free water equivalent: 100ml_5.3_6.47=88.23ml
Volume of alcohol required to preserve the product is 88.23×18%=15.88
15.88 absolute alcohol ÷95%=16.71ml Alcohol USP or 17ml Alcohol USP
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