Question

What is the mass percent of sodium carbonate, %(m/m) Na₂CO₃, in a solution prepared by dissolving 4.28 grams of sodium carbonate in 35.11 grams of water.

Answer 1

The mass percent of sodium carbonate in the solution is calculated using the mass of the solute and solvent to find that the mass percent is 10.86%.

Step-by-step explanation:

To calculate the mass percent of sodium carbonate, Na2CO3, in a solution, we use the following formula: percent by mass = (mass of solute / (mass of solute + mass of solvent)) × 100%.

In this scenario:

• Mass of sodium carbonate (solute) = 4.28 grams
• Mass of water (solvent) = 35.11 grams
• Total mass of solution = 4.28 g + 35.11 g = 39.39 grams

Now, applying the formula:

Percent by mass = (4.28 g / 39.39 g) × 100% = 10.86%

Therefore, the mass percent of sodium carbonate in the solution is 10.86%.