What is the Percent Composition of a Solution?

What is the percent (m/m) of a solution containing 25 g of NaCl in 175 g of solution?

A. 700%

B. 7.0%

C. 14%

D. 0.14%

Answer:

14%, C. 14%

When calculating the percent composition of a solution, you need to consider the mass of the solute (in this case, NaCl) and the total mass of the solution.

To determine the percent composition (m/m), you can use the formula:

Percent (m/m) = (mass of solute / total mass of solution) x 100%

In this case, the mass of NaCl (solute) is 25 g and the total mass of the solution is 175 g. Plug these values into the formula:

Percent (m/m) = (25 g / 175 g) x 100% = 14%

Therefore, the percent composition of the solution containing 25 g of NaCl in 175 g of solution is 14%.