How many grams of K2Cr2O7must be added to a 145.4 mL volumetric flask to prepare a...
How many grams of K2Cr2O7must be added to a 145.4 mL volumetric flask to prepare a 0.334 M K2Cr2O7.
Homework Answers
first find the moles and then calculate the mass as
follows
no of moles = molarity * volume in liters
moles = 0.334 M * 0.1454 L => 0.0485636 moles
mass = moles * molar mass
molar mass of K2Cr2O7 = 294.185 g/mol
mass = 0.0485636 moles * 294.185 g/mol
mass = 14.2866 grams
answer => 14.2866 g of K2Cr2O7
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