Asked by Sue

If you have a 500 mL of a 0.4M Nacl solution. How much water is needed to make is 0.1M solution?
Answered by Samah
moles = molarity(M) x volume(L) = 0.4 x 500 / 1000 = 0.2 moles
0.2 moles in 2L = 0.1M
So you need 1.5L water
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