Question

Calculate the molarity of a solution made by dissolving 3.0 grams of calcium chloride ((CaCl_2)) in enough water to make 300 mL of solution.

Answer 1

To calculate the molarity of the solution, you need to know the number of moles of calcium chloride and the volume of the solution. The molarity of the solution is 0.0908 M.

Step-by-step explanation:

To calculate the molarity of a solution, you need to know the number of moles of solute and the volume of the solution. In this case, the solute is calcium chloride (CaCl2) and the volume is 300 mL. First, you need to calculate the number of moles of calcium chloride using its molar mass. The molar mass of CaCl2 is 110.98 g/mol. The number of moles is calculated as follows:

Number of moles = Mass of CaCl2 / Molar mass of CaCl2

Substituting the values:

Number of moles = 3.0 g / 110.98 g/mol

Next, you need to convert the volume from milliliters (mL) to liters (L). There are 1000 mL in 1 L. Therefore, the volume is 300 mL / 1000 mL/L = 0.3 L.

Finally, you can calculate the molarity using the formula:

Molarity = Number of moles / Volume of solution

Substituting the values:

Molarity = 3.0 g / 110.98 g/mol / 0.3 L

Molarity = 0.0908 M