What is the molarity of the solution that results when 60g NaOH is added to enough water to make 500mL solution?
To find the molarity of a solution, you need to know the amount of solute (in moles) and the volume of the solution (in liters). In this case, you have been given the mass of NaOH (60g) and the volume of the solution (500mL).
1. Convert the mass of NaOH to moles:
Use the molar mass of NaOH to convert grams to moles. The molar mass of NaOH is:
Na (22.99 g/mol) + O (16.00 g/mol) + H (1.01 g/mol) = 39.99 g/mol
Divide the mass of NaOH (60g) by the molar mass (39.99 g/mol) to get the moles of NaOH:
60g / 39.99 g/mol ≈ 1.5 moles
2. Convert the volume of the solution to liters:
The volume of the solution is given in milliliters (mL). To convert to liters, divide by 1000:
500 mL / 1000 = 0.5 liters
3. Calculate the molarity of the solution:
Molarity (M) is defined as moles of solute divided by the volume of the solution in liters.
Molarity = moles of solute / volume of solution
Molarity = 1.5 moles / 0.5 liters = 3 M
Therefore, the molarity of the solution is 3 M.