SOLUTION: If 750 ml of a 6% solution is diluted to 2000 ml, the percentage of the final solution will be?

Question 865737: If 750 ml of a 6% solution is diluted to 2000 ml, the percentage of the final solution will be?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
When you dilute any solution, you're just adding pure water to it (to lower the concentration of the pure stuff in relation to the mix).

We have 750 ml of a 6% solution, so we have 750*0.06 = 45 ml of pure stuff (whatever it is).

Notice how (Amount of pure stuff)/(Amount of solution) = 45/750 = 0.06 which is 6% as expected.

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We bump up the total amount of solution to 2000 ml (2000-750 = 1250 ml of pure water is added). The amount of pure stuff (whatever it is) stays the same at 45 ml. We have this new fraction

(amount of pure stuff)/(amount of solution) = 45/2000 = 0.0225

Multiply by 100 to convert over to a percentage: 0.0225*100 = 2.25%

So the percentage of the final solution is 2.25%

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