Question

If in sanitizer 20 gram of alcohol present in 100 mL water. Calculate concentration (v/v %)of

that sanitizer.

Given density of alcohol = 2g/mL.

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Answer 1

Answer:

40%

Explanation:

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Answer 2

Good morning My dear friend,Here is the answer to your question,

Density of alcohol = 2 g/ ml

Density = mass / volume

Therefore,

2 = 20 / volume

volume = 20/2 = 10 ml

volume of alcohol = 10 ml

Total volume of solution = 100 ml + 10 ml = 110 ml

Concentration  =  (volume of alcohol / volume of solution) *100

therefore,

concentration = (10 /110) *100

                       = (1/11)*100

                        = 9.09 %

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