You need to make an aqueous solution of 0.121 M magnesium chloride for an experiment in lab, using a 250 mL volumetric flask. How much solid magnesium chloride should you add ?

2 answers

How many moles do you need? That is M x L = ??
moles = grams/molar mass. You know moles and molar mass, solve for grams.
zszz