Test Tube #2: Unknown sample (KCLO3 + KCL) 1. Determine the weight of unknown heated. 2. Determine the weight of oxygen gas released using the constant weight obtained after completion of the heating's. 3. Determine the number of oxygen gas (0₂) lost? 4. Using stoichiometry, use the number of O₂ gas released to determine the moles of KCLO decomposed, 5. Determine the number of grams of KCLO, decomposed. 6. Based on the number of grams of KCLO, decomposed and the total amount of unknown placed in the test tube, determine the percent KCLO, present within the unknown.

Test Tube #2: Unknown sample (KCLO3 + KCL) 1. Determine the weight of unknown heated. 2. Determine the weight of oxygen gas released using the constant weight obtained after completion of the heating's. 3. Determine the number of oxygen gas (0₂) lost? 4. Using stoichiometry, use the number of O₂ gas released to determine the moles of KCLO decomposed, 5. Determine the number of grams of KCLO, decomposed. 6. Based on the number of grams of KCLO, decomposed and the total amount of unknown placed in the test tube, determine the percent KCLO, present within the unknown.

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...

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

Test Tube #2: Unknown sample (KCLO3 + KCL)
1. Determine the weight of unknown heated.
2. Determine the weight of oxygen gas released using the constant weight obtained after
completion of the heating's.
3. Determine the number of oxygen gas (0₂) lost?
4. Using stoichiometry, use the number of O₂ gas released to determine the moles of KCLO 3
decomposed,
5. Determine the number of grams of KCLO, decomposed.
6. Based on the number of grams of KCLO, decomposed and the total amount of unknown
placed in the test tube, determine the percent KCLO3 present within the unknown.

Data Table 2: Unknown Sample #
16
(Test Tube #2)
Mass (g) Difference (g)
Weight of test tube + MnO₂
45.408g
Weight of test tube + MnO₂ + Unknown 46.466g
Weight after 1st heating
46.183g
46.083g 0.1g
Weight after 2nd heating
Weight after 3rd heating
Constant weight
46.080 0.003g
46.115g

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