When a 0.4500 g sample of impure potassium chloride was dissolved in water and treated with an excess ofsilver nitrate, 0.8402 g of silver chloride was precipitated. Calculate the percentage KCl in the original sample.

The % of KCl in the original sample would be as follows:

%

Given that,

Amount of sample of impure Potassium Chloride

Amount of Silver Nitrate precipitated

Now,

Molarity of KCl =

Minimum moles required for reaction

Final number of moles  

So,

Concentration = Number of moles * Molarity

Therefore,

% of KCl in the original Sample = Weight of Pure KCl/Weight of Impure KCl

×

%

Thus, % is the correct answer.

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97.78% KCl in the original sample

Explanation:

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.