(a)
Interpretation:
How many moles of triiodide
Concept introduction:
Mole defined as amount of chemical substance contains number of particles as the number of atoms in 12g of C-12.
(b)
Interpretation:
Concentration of Sodium thiosulphate
Concept introduction:
Molarity is one of the concentration unit. Molarity is defined as number of moles of the solute in one litre of solution.
(c)
Interpretation:
Weight percentage of Ascorbic acid in the unknown has to be calculated.
Concept introduction:
The mass percentage or weight percentage of compound can be calculated by taking 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,
(d)
Interpretation:
It is the matter whether starch indicator is needed at the starting or near the end point in the titration of part (c) has to be explained.
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Quantitative Chemical Analysis
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