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calculating grams of a solute

Chemistry
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1.6 liters of  .5% solution of NaCl

Dec 1st, 2014

Hi Katie, it looks like you are trying to calculate the grams of NaCl (sodium chloride) in 1.6L of a 0.5% solution. There are two possible ways to answer this question.

The formula for mass percent solutions is as follows:

percent solution = 100 * (grams of solute / grams of solvent)

1mL of water = 1 gram, and so the total mass of your solvent would be:

1,600mL H2O * (1g H2O / 1mL H2O) = 1,600 grams H2O

To find the grams of NaCl in the 0.5% solution:

0.5% = 100 * ( x grams of solute / 1,600 grams H20)

rearrange the equation:

x grams of solute = (0.5 * 1600 g H2O) / 100 = 8 grams of NaCl

Dec 2nd, 2014

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