posted by Slaysliver on .
how do you do this question
An aqueous solution of calcium chloride contains 2 grams of calcium chloride ( molar mass 110.98 g mol-1)
in 100 ml calculate the concentration of chloride ion (Cl-) in the solution
2 g CaCl2 is how many moles?
2 g/molar mass CaCl2 = ?? moles.
M = moles/L = ??moles/0.100 L (that's the 100 mL).
M Cl^- is twice that of the CaCl2 since there are two moles Cl^- per mole CaCl2.
Post your work if you need further assistance.