Show the calculation required to obtain 0.05M CaCl2

Question

Show the calculation required to obtain 0.05M CaCl2 (aq) value

Answer 1

Assuming you mean the calculation to obtain a solution that is 0.05 M CaCl₂, which means 0.05 moles CaCl₂/liter, you would do the following:

(1) Choose a volume of solution desired.  For example, 100 ml, 500 ml 1000 ml (1 liter), etc.  For the following calculation, we'll use 1liter.

(2) Determine the mass of CaCl₂ required for 0.05 moles

• molar mass of CaCl₂ in g/mole x 0.05 moles = grams CaCl₂ equal to 0.05 moles
• Dissolve this amount of CaCl₂ in sufficient water to make a final volume of 1 liter (1000 mls)

For other volumes, adjust the mass of CaCl₂ accordingly.  For example, to prepare 500 ml, use 1/2 the calculated mass.