can you help me to answer this
Concentrations (Problem Solving)
2. A solution is made by dissolving 3.88 g of NaCl in enough water to make 67.8 mL of solution. What is the concentration of sodium chloride in units of weight/volume percent?
To find the concentration of sodium chloride in weight/volume percent, we first need to calculate the total weight of the solution.
Given:
Mass of NaCl = 3.88 g
Volume of solution = 67.8 mL
Density of water is approximately 1 g/mL, we can assume the density of the solution to be close to 1 g/mL.
Total weight of solution = Mass of NaCl + Volume of solution = 3.88 g + 67.8 g = 71.68 g
Now, we can calculate the weight/volume percent concentration of NaCl in the solution:
Weight percent = (mass of NaCl / total weight of solution) * 100
Weight percent = (3.88 g / 71.68 g) * 100
Weight percent ≈ 5.41%
Therefore, the concentration of sodium chloride in units of weight/volume percent is approximately 5.41%.