I've gotten the answer wrong three times! HOW DO I DO THIS!!
0.04
0.36
33
These were all my answers :/
1 Answer
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If you're diluting 200 mL in a total of 600 mL, that's a dilution of 200/600 = 1/3.
So the percentage of NaCl = 12 * (1/3) = 4%.
Another way :
C1 * V1 = C2 * V2
C1 = initial concentration = 12%
V1 = initial volume = 200 mL
C2 = final concentration (unknown)
V2 = final volume = 600 mL
Substituting : 12 * 200 = C2 * 600
Therefore, C2 = 12 * 200 / 600 = 4%.