A chemistry graduate student combines 3.90 grams of potassium and 12.7 grams of iodine to form potassium iodide. according to the law of conservation of mass, potassium iodide should be formed after the reaction is complete is 16.70 g.
According to the law of conservation mass, in a chemical reaction mass can neither be created nor destroyed.
According to the law, mass of the reactant is always equal to the mass of product, because in a chemical reaction, mass can neither be created nor destroyed.
The balanced chemical reaction is -
2 K + I₂ → 2 KI
3.90 g + 12.7 g = 16.70 g
16.70 g = 16.70 g
Therefore, when the reaction proceeds to completion, 16.70 g product is obtained as the sum of reactants is 16.70 g and according to law of conservation of mass, mass is neither created nor destroyed but it only converts from one form to another form.
Hence, potassium iodide formed is 16.70 g.
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