Question

What volume in milliliters of 2.0 0M calcium chloride stock solution would you use to make 500 ML of 0.3 00M calcium chloride solution

Answer 1

2.0 0M calcium chloride mean there are 2moles per litre.

0.3 00M means 0.3moles per litre

if 0.3moles are in 1000ml, then

$(500/1000)*0.300$ =0.15 moles