How much water should be added to 1 liter of water with 20000 ppm of iron nitrate to become 200 ppm of iron nitrate?

Answer 1

99 Liters of water. If there are 20,000 ppm of iron nitrate in 1 liter of water then you would need to reduce the iron nitrate concnetration by a factor of 100. So since you are only adding water you need to have 100 times as much water than you had originally in order to dilute the concentration to 200 ppm. Since you have 1 liter already you need to add 99 more to get 100 times more water than you originally started with. You can also solve it using the following equation:

(Original Concnetration)*(Vol. original concentration) = (New concnetration)*(Original volume + amt of water to add)

20,000*1L = 200*(1L + X)20,000=200 + 200XSolving for X, X=99

Answer 2

To dilute the iron nitrate solution from 20000 ppm to 200 ppm, you need to add 99 parts of water for every 1 part of the original solution. Therefore, you would need to add 99 liters of water to 1 liter of the iron nitrate solution to achieve a concentration of 200 ppm.