Question

A student doing a chemistry experiment has a beaker that contains 100 ml (milliliters) of an alcohol and water solution. The lab directions indicate that there is 4 times as much water as alcohol in the solution. How many milliliters of alcohol are in the solution? How many milliliters of water are in the solution?

Answer 1

Answer : amount of water = 80ml
amount of alcohol = 20ml

Answer 2

The amount of water in millimeters present in the solution is 80 millimeters

• Solution = Water + alcohol

Let's assume that, amount of alcohol in solution = a :

• Amount of water in solution = 4a

The expression for the amount of water and alcohol and the total volume of the solution can be expressed thus :

a + 4a = 100

5a = 100

Divide both sides by 5

5a/5 = 100/5

a = 20

The amount of water in the solution = 4a

• Amount of water = 4(20) = 80

Therefore, the amount of water in the solution is 80 millimeters

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