Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
Related questions
Question
The decomposition of potassium chlorate (KCIO3)

Transcribed Image Text:position of KCIO, Lab
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4.
14
Claim, Evidence, Reasoning for
The Decomposition of Potassium Chlorate (KCIO,)
Question/Problem: what is the % compositdon of potassium chlorate (KCIO.) in a mixture of
potassium chlornate and pocassian chloride (KC)?
Discussion/Background:
1. The study of the quantitative relationships oy achencal.ceaction is called stoichiometry
2. When heated, potassium chlorate (KCIO3 decooposes. Oxygen gas is released and potassium
chloride (KCI) is formed during the reaction
MgO
KC10, (s)
→ KC1
(s)
+ O2ig)
-74.5gmel
Percentage of KCI in KC10, =60.82%
122.5 g/mol
3. The decomposition is aided by the presence of a catalyst, manganese dioxide. The MnO, will
remain unchanged during the entire reaction process.
4. The potassium chloride (KCI) in the original mixture remains unchanged when heated.
Objective:
11
The weight of test tube with cotolyst- W9

Transcribed Image Text:position of KCIO, Lab
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14
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-
(hefore boding off O
Mass of KCIO
(Before boiling of o)
Mass of of KCI
hefore Soding ofo)
Percentage of KCIO, in mixture
(before holing off O)
F
Mr. James Melton / Mr. Vanderschral
Conclusion (C.E.R.):
1. Restate, and accept or reject the hypothesis. Make a claim that directly relates to the research
question.
2. Describe the evidence that supports your claim.
3. What is the reasoning behind your results.
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