QUESTION
5
8 MARKS
a) How many grams of BaCl2.2H2O (MW = 244.27 g/mol) you need to
prepare 250
mL of 0.15 M chloride ion solution?
2 marks
b) It was established that this reagent was contaminated by CaCl2
(MW = 181.82
g). The content of calcium in the solid sample was found to be 4750
ppm (w/w).
What was the percentage decrease in the molar Barium ion
concentration
caused by this contamination?
6 marks
hi chemists I recieved this question after my practical today to work on at home can someone please help me
How many grams of BaCl2.2H2O (MW = 244.27 g/mol) you need to
prepare 250
mL of 0.15 M chloride ion solution?
M = n solute / V solution L
M = (mass / molar mass) / V solution L
MV = mass / molar mass
MV(molar) = mass
plugging values
for the mass.
MV(molar) = mass
(0.15 M)(0.25 L)(244.27 g/mol) = mass
9.16 g = mass ------Answer)
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QUESTION 5 8 MARKS a) How many grams of BaCl2.2H2O (MW = 244.27 g/mol) you need...
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