Question

Grant plans to evaporate enough water from 22 gallons of a 16% ammonia solution to make a 24% ammonia solution. Which equation can he use to find n, the number of gallons of water he should remove

Answer 1

Hi, and welcome to QuestionCove!

We can start by finding out how much ammonia is in the 22 gallon solution. We know that the concentration is 16%, so 16% of 22 gallons or (0.16 * 22) should give us the amount of ammonia. We can call this number "a".

Then, we want to get a 24% ammonia solution. So, we can take the amount of ammonia we found and divide that by 24%, (a/0.24), in order to find the total volume of the final solution. From there, it should be simple to figure out how much water Grant needs to evaporate; just find the difference between the starting volume and the final volume

In terms of an equation, can you see an answer choice that represents the process described above?