Calculate the mass-volume percent of 5.0 g of magnesium chloride (MgCl2) in enough water to give 250 mL of solution.

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Answer:

250*5.0=125.0

Step-by-step explanation:

250*5.0=125.0

Considering the definition of mass-volume percent, the mass-volume percent of 5.0 g of magnesium chloride in enough water to give 250 mL of solution is 2%.

Mass-volume percent

Mass-volume percent is a measure of concentration that indicates the number of grams of solute in each 100 mL of solution. It is an intensive property, that is, it does not depend on the amount of material.

Mass-volume percent is defined as the mass of solute in grams divided by the total volume of the solution in milliliters. To express this as a percent, we multiply this fraction by 100:

[tex]Mass-volume percent=\frac{mass of solute}{volume}x100[/tex]

Mass-volume percent of magnesium chloride

In this case, you know:

  • mass of solute= 5 g
  • volume= 250 mL

Replacing in the definition of mass-volume percent:

[tex]Mass-volume percent=\frac{5 g}{250 mL}x100[/tex]

Solving:

Mass-volume percent= 2%

Finally, the mass-volume percent of 5.0 g of magnesium chloride in enough water to give 250 mL of solution is 2%.

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