how many liters of 70% alcohol solution must be mixed with pure water (o% alcohol) make 35 liters of a 50% solutions?

Question

struggle with words problems could use some help

Answer 1

how many liters of 70% alcohol solution must be mixed with pure water (o% alcohol) make 35 liters of a 50% solutions

vol(conc) = vol(conc

v (.70) = 35(.50)

.70v = 17.5

v = 25 L of 70% and 10L of water