"Published in Newark, California, USA"
What weight of an impure NaCl sample must be taken for analysis so that the weight of AgCl precipitate obtained in mg will be equal to the % Cl in the sample?
Solution:
The description of a given problem is about gravimetric analysis in which the amount of an impure NaCl is unknown. If the amount of impure NaCl sample is dissolved in water and then add with AgNO3 solution, then AgCl precipitate will be formed as follows
By using gravimetric analysis, if x is the weight of AgCl crystals in mg, then the weight of Cl in AgCl is
If the weight of AgCl precipitate is equal to the % Cl in the sample, therefore the weight of impure NaCl sample is
