
(a)
Interpretation:
The mass percentage of calcium in given mineral has to be calculated.
Concept introduction:
The mass percentage of compound can be calculated by dividing the calculated mass of the substance to the total mass of the sample whole multiplied by 100.
The mass percent can be calculated with formula,
Molarity can be defined as the moles of solute to the volume of the solution (in litres). The molarity of a solution can be given by the formula,
(b)
Interpretation:
The reason for heating unknown and precipitant solution before added together has to be explained.
(c)
Interpretation:
The benefits of cleaning precipitate with ammonium oxalate has to be explained.
(d)
Interpretation:
The filtrate testing benefits with silver nitrate has to be explained.

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Chapter 27 Solutions
Quantitative Chemical Analysis
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