What is the mass-volume percent (m/v %) of a solution containing 29.0 g of calcium sulfate dissolved in 103 mL of solution?

• A. 28.2%
• B. 2.81%
• C. 3.55%
• D. 0.281%

Answer: (A)

Verified step by step guidance

1. Understand that mass-volume percent (m/v %) is defined as the mass of solute (in grams) divided by the volume of the solution (in milliliters), multiplied by 100%. The formula is: \(\text{m/v \%} = \left( \frac{\text{mass of solute (g)}}{\text{volume of solution (mL)}} \right) \times 100\%\).
2. Identify the given values: mass of calcium sulfate (solute) = 29.0 g, and volume of solution = 103 mL.
3. Substitute the given values into the formula: \(\text{m/v \%} = \left( \frac{29.0}{103} \right) \times 100\%\).
4. Perform the division of mass by volume to get the ratio in g/mL before multiplying by 100%.
5. Multiply the result by 100% to convert the ratio into a percentage, which gives the mass-volume percent concentration of the solution.