Suppose you want to make a 10 percent solution (by volume) of colored water
Your teacher tells you that the final volume of the 10 percent solution is 1 liter.
Describe how you would make the solution. How much water would you use to
dilute the colored solution? How much of the original solution would you use?
What will be an ideal response?
a) Remembering that 10 percent is equal to 1?10 and that 1 liter is equivalent to
1,000 ml, you would multiply 1,000 ml by 1?10 to calculate the volume of colored
solution to be used.
b) 1,000 ml (final volume) × 1?10 (concentration of solution) = 100 ml (colored
solution)
c) If the final volume of the solution is to be 1 liter (1,000 ml), the amount of water
to be added to the colored solution is the final volume (1,000 ml) minus the
volume of the colored solution (100 ml).
d) 1,000 ml (final volume) – 100 ml (colored solution) = 900 ml (water)
e) To summarize the calculations, you would add 100 ml of the colored solution to
900 ml of water to obtain a 10 percent solution with a final volume of 1 liter.
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