Molarity and Number of Moles

Number of mole of solute in a solution can be calculated by using the following formula
n= MV 1000 where
n = number of mole of solute
M = molaruty of the solution
V = volume of the solution in cm3

Example:
How many moles of zinc sulphate is present in 200cm3 of 0.1 mol dm-3 zinc sulphate solution?

Answer:
Molarity, M = 0.1 mol dm-3
Voloume, V = 200cm3
n= MV 1000 n= (0.1)(200) 1000 =0.02mol

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