the recipe she finds online recommends that fresh lemon juice should be 20% of the total volume. She has 18 oz of fresh lemon juice. How much water should you mix with lemon juice
In this problem we know that
18 oz of fresh lemon juice------> represent 20% of the total volume
so
80% represent the volume of water
Applying proportion
18/20%=x/80%
x=18(80)/20
x=72 oz of water
How much hydrochloric acid needs to be mixed with 1500 milliliters of water to make a. solution that is 12% acid
In this problem
1500 milliters represent (100%-12%)=88%
Applying proportion find the 12%
1500/88%=x/12%
x=1500(12)/88
x=204.55 milliters of acid