How much water should be added to a 50ml of 25% acid solution to dilute it to a 10% acid solution?
Answer:
v1 x c1 = v2 x c2
volume1 x concentration1 = volume2 x concentration2
50mL x 25% = volume2 x 10%
solve for volume2
volume2= (50mL) x 25% / 10%
volume2= 125mL
So if volume2 is 125mL and also the final volume of the 10% solution made from 50mL of the 25% solution, then you have to add 75mL of water to the 50mL of 25% to get 125mL of the 10% solution.
well if 25% of 50 ml is 12.5 ml of acid..
10% of 125 is 12.5 ml
so to get 50 to 125 you have to add 75ml
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