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
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
