. To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at

293 K. Find the percent concentration at this temperature.
3. A solution of acetone contains 20 ml of acetone in 480 ml of water. Calculate the %
concentration of solution

%NaCl(w/w) = [36/(36+100)]*100 = ?

%acetone(v/v) = [20/20+480)]*100 = ?

To find the percent concentration of a solution, you need to determine the amount of solute (in grams or milliliters) in the solution and divide it by the total volume of the solution (in grams or milliliters), then multiply the result by 100.

1. Question 1: Sodium Chloride in Water
Given data:
- Amount of sodium chloride (solute): 36 g
- Amount of water (solvent): 100 g

To find the percent concentration:
1. Add the amount of solute and solvent: 36 g + 100 g = 136 g
2. Calculate the percentage concentration: (36 g / 136 g) x 100 = 26.47%

Therefore, the percent concentration of the sodium chloride solution at 293 K is 26.47%.

2. Question 2: Acetone in Water
Given data:
- Amount of acetone (solute): 20 ml
- Amount of water (solvent): 480 ml

To find the percent concentration:
1. Add the amount of solute and solvent: 20 ml + 480 ml = 500 ml
2. Calculate the percentage concentration: (20 ml / 500 ml) x 100 = 4%

Therefore, the percent concentration of the acetone solution is 4%.