Problema Solution
You need 570mL of a 15% alcohol solution.On hand, you have a 95% alcohol mixture. How much of the 95% alcohol mixture and pure water will you need to obtain the desired solution?
Answer provided by our tutors
let
x = mL of the 95% alcohol mixture
y = mL of pure water (0% alcohol mizture)
You need 570mL of a 15% alcohol solution:
x + y = 570
0.95x + 0*y = 0.15*570
by solving the above system of equation we find:
x = 90 mL
y = 480 mL
click here to see the step by step solution of the system od equations:
you will need 90 mL of 95% alcohol mixture and 480 mL of pure water.