Problema Solution
A chemistry student needs a 20% solution of Hydrocloric Acid. He has a 40% solution. How many ml of water does he need to add to 10ml of the 40% solution to get the 20% solution?
Answer provided by our tutors
40% hcl solution
4ml in 10ml of solution
for 20 percent we need
4 ml in 20 ml of solution
hence we need to add 10 ml water