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In a practical session, Hubert was asked to prepare potassium peroxide, K2O2 (s). He measured 3.910...

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Chemistry

In a practical session, Hubert was asked to prepare potassiumperoxide, K2O2 (s). He measured 3.910 g of potassium metal andburnt it in a container of oxygen gas with a mass of 2.560 g.

a) Write a chemical equation with state symbols for the reactionbetween potassium and oxygen.

b) Deduce which reactant, potassium or oxygen, is limiting.

c) Calculate the amount, in gram, of K2O2 (s) produced in thereaction.

d) It was found that the mass of K2O2 (s) obtained in theexperiment was 3.609g. Calculate the percentage yield of K2O2(s).

Answer & Explanation Solved by verified expert
4.0 Ratings (444 Votes)
a The chemical reaction between Potassium K and Oxygen O2 to form K2O2 is 2K O2 K2O2 ie 2 mole of K need to react with 1 mole of O2 to produce 1 mole of K2O2 b Now given mass of K taken 3910 g    See Answer
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