How much water must be added to 1 litre of 5% cordial mixture to produce a 4% cordial mixture

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How much water must be added to 1 litre of 5% cordial mixture to produce a 4% cordial mixture

[From: ] [author: ] [Date: 11-12-12] [Hit: ]

..water to be added = 1250-1000=250ml-0.05/(x + 1) = 0.0.01x = 0.......

^^^^^ yeah i really don't understand. i pay attention in class but...

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concentration = cordial mixture mass/ solution mass x100

5%=md/1litre x 100 =>md=50g cordial mixture in 1 litre solution

4%=50g/ms x 100

ms=5000/4=1250ml

water to be added = 1250-1000=250ml

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0.05/(x + 1) = 0.04

0.01x = 0.04

x = 4 liters

1

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