Dilution Calculation

# Dilution Calculation - d Problem How can we prepare 100 of...

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Dilution Calculation All the calculations that you need to do are based on a simple fact. As a solution is diluted, the number of moles of solute doesn't change; the solute simply spreads out through a larger volume. We will use the following symbols: V for volume and M for molarity. Therefore V c and M c are the concentrated solutions volume and molarity. V d and M d are then the diluted solutions volume and molarity. V c M c = V d M
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Unformatted text preview: d Problem: How can we prepare 100 of 0.040 K 2 Cr 2 O 7 from 0.200 M K 2 Cr 2 O 7 ? Solution: First assemble the data into a table: V c = ? V d = 100 mL M c = 0.200 M M d = 0.040 M Next, use the formula from above. V c X 0.20 M = 100 mL X 0.040 M V c = 100 mL X 0.040 M 0.20 M V c = 20.0 mL Place 20.0 mL of 0.200 M K 2 Cr 2 O 7 into a 100 mL volumetric flask and then add water until the final volume is 100 mL....
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