To calculate the molarity of a solution, you first need to convert the grams of solute to moles, then divide by the liters of solution.
1. Calculate the moles of sodium chloride:
- The molar mass of NaCl is 58.44 g/mol
- Moles = mass / molar mass
- Moles = 20.45 g / 58.44 g/mol
- Moles = 0.35 mol
2. Convert milliliters to liters:
- 1 L = 1000 mL
- Liters = 709.0 mL / 1000 mL/L
- Liters = 0.709 L
3. Calculate the molarity:
- Molarity = moles / liters
- Molarity = 0.35 mol / 0.709 L
- Molarity = 0.494 M
Therefore, the molarity of the solution is 0.494 M.
What is the molar out of a solution that contains 20.45 g of sodium chloride dissolved in 709.0 mL of solution?
1 answer