Question

A solution was prepared by dissolving 135 g of LiF into 50.0 g of solution. Find the

Answer 1

Answer:

25.0%

Step-by-step explanation:

pretty sure its this hope you get it right good luck

A solution's mass by mass percent concentration,

m/m%

, tells you the number of grams of solute present for every

100 g

of solution.

Your solution contains two substances: sodium chloride,

NaCl

, the solute, and water, the solvent. To find the total mass of the solution, add the mass of the solute and the mass of the solvent.

mass solution = 50.0 g + 150.0 g

mass solution = 200.0 g

Now, this solution contains

50.0 g

of solute in

200.0 g

=

2

⋅

100.0 g

of solution. This means that

100.0 g

of solution will contain

50.0 g

2

=

25.0 g

of solute. Since this represents the amount of solute present in

100.0 g

of solution, you can say that the mass by mass percent concentration is equal to

m/m% = 25.0% NaCl

−−−−−−−−−−−−−−−−−−−

The answer is rounded to three sig figs.

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