Potassium chlorate will decompose when heated to form two products, one of which is oxygen gas....

Question:

Potassium chlorate will decompose when heated to form two products, one of which is oxygen gas. The other is a solid that remains in the test tube.

mass of empty test tube = 13.85 g

mass of test tube and potassium chlorate = 38.85 g

mass of test tube and final product = 29.44 g

a. Write the balanced equation for the reaction.

b. What mass of potassium chlorate reacted? (Assume all the available potassium chlorate reacted.)

c. What is the actual yield of oxygen?

d. Determine the theoretical yield of oxygen.

e. Calculate the percent error.

Decomposition Reactions:

The synthesis and decomposition reactions are opposites. The general equation for the synthesis reaction is {eq}A + B \rightarrow AB {/eq}, while the equation for decomposition is {eq}AB\rightarrow A + B {/eq}.

Answer and Explanation: 1

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a. The balanced equation for the complete decomposition of potassium chlorate is

{eq}2\: KClO_3 \: (s)\overset{heat}{\rightarrow}2\: KCl \: (s) + 3...

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Decomposition and Synthesis Reactions

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Chapter 10 / Lesson 2
36K

Elements and compounds multiply and new compounds form through the processes of decomposition and synthesis reactions. Learn about these reactions, understand how they occur, and explore their equations.


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