How many grams of #MgSO_4# are needed to prepare 125mL 0.200M magnesium sulfate?

1 Answer
anor277
Mar 1, 2017

#"Concentration"# #=# #"Moles of solute"/"Volume of solution"#

Explanation:

And #"mass of solute "=" moles"xx"molar mass"#

And so we calculate the product:

#"Volume"xx"Concentration"xx"Molar mass of magnesium sulfate"#

#=125xx10^-3cancel(L)xx0.200*cancel(mol*L^-1)xx120.37*g*cancel(mol^-1)#, an answer with units of mass as required.

#=??*g#

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