Calculate the mass in grams of CaCl2 found in 115 mL of a 0.0200 M CaCl2 solution
To calculate the mass of CaCl2 in 115 mL of a 0.0200 M solution, we first need to calculate the number of moles of CaCl2 in 115 mL solution.
Step 1: Calculate the number of moles of CaCl2 in 115 mL of 0.0200 M solution
Molarity = moles / volume
0.0200 mol/L = moles / 0.115 L
moles = 0.0200 mol/L x 0.115 L
moles = 0.0023 mol
Step 2: Calculate the molar mass of CaCl2
Ca = 40.08 g/mol
Cl = 35.45 g/mol x 2 = 70.90 g/mol
molar mass of CaCl2 = 40.08 g/mol + 70.90 g/mol
molar mass of CaCl2 = 110.98 g/mol
Step 3: Calculate the mass of CaCl2 in 0.0023 mol
mass = moles x molar mass
mass = 0.0023 mol x 110.98 g/mol
mass = 0.255 g
Therefore, there are 0.255 grams of CaCl2 in 115 mL of a 0.0200 M CaCl2 solution.