Answered

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What is the weight percent (w/w%) of a solution prepared by dissolving 15.0 g of sugar into 50.0 g of water?

Sagot :

CrystalQueen

Answer:

23.1%

Explanation:

To find the weight percent (aka. mass percent), you need to use the following equation:

                                   mass of solute (g)
Weight Percent  =  ----------------------------------  x  100%
                                  mass of solution (g)

In this case, the solute is sugar and the solution is the sugar and water. You can find the weight percent by plugging the given values into the equation and solving. The final answer should have 3 sig figs like the given values.

mass of solute = 15.0 g

mass of solution = 15.0 g + 50.0 g = 65.0 g

                                   15.0 g solute
Weight Percent  =  -------------------------  x  100%
                                     65.0 g soln

Weight Percent  =  0.231  x  100%

Weight Percent  =  23.1%

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