Question

A pharmacist has an 18% alcohol solution. How much of this solution and how much water must be mixed together to make 10 liters of a 12% alcohol solution?

Answer 1

10

explanation

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Answer 2

Answer:

This solution is 6.667 litres

Water is 3.337 litres

Step-by-step explanation:

Consider x to be the volume of the 18% solution needed.

Then volume of water would be

= 10- x

From the alcohol % we can write below equation;

0.18*x = 0.12*10.

Calculating the value of x;

0.18x = 1.2  

X =  6.667.

This means that 6.667 liters of the original 18% alcohol solution should be used.

Volume of water = 10 – 6.667  = 3.33 litres