Problem1 Solution

Answer= 8 liters.

One way to do the problem: If we have 10 liters of solution and we want a 0.2 liter solution it means that 2 out of the 10 liters have to be 1 molar NaOH. Since we only have 0.25 molar NaOH it means that the number liters needed will be four times greater than if we had 1 molar. Therefore we need 8 liters of NaOH.

Another way to solve this problem is to use the equation:

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