Answered: -What is the oxidation number of SODIUM…

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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Question

IDENTIFY THE OXIDATION NUMBER OF EACH ELEMENT IN THE GIVEN CHEMICAL FORMULA.

All answers to be entered via short answer are in the numerical format

Include the sign (either positive or negative)

E.g.: KI

- What is the oxidation number of potassium?
- Answer: +1

- What is the oxidation number of iodine?
- Answer: -1

Givenproblems:

-What is the oxidation number of SODIUM in sodium chloride (NaCl)?

-What is the oxidation number of CHLORINE in sodium chloride?

-What is the oxidation number of MAGNESIUM in magnesium hydroxide Mg(OH)₂?

-What is the oxidation number of OXYGEN in magnesium hydroxide Mg(OH)₂?

-What is the oxidation number of HYDROGEN in magnesium hydroxide Mg(OH)₂?

-What is the oxidation number of POTASSIUM in potassium dichromate K₂Cr₂O₇?

-What is the oxidation number of CHROMIUM in potassium dichromate K₂Cr₂O₇?

-What is the oxidation number of OXYGEN in potassium dichromate K₂Cr₂O₇?

Given Problem:

Identify the coefficient of each compound in the reaction.
- All answers to be entered via short answer are in the numerical format

Redox Reaction: I2O5 + CO -> I2 + CO2

-To balance the reaction, what must be the coefficient of I₂O₅? *

Your answer

-To balance the reaction, what must be the coefficient of CO? *

Your answer

-To balance the reaction, what must be the coefficient of I₂? *

Your answer

-To balance the reaction, what must be the coefficient of CO₂?

Given problem:

1. A 0.2295 g of sodium oxalate required 35.12 ml of potassium permanganate solution in a titration. What is the normality of the potassium permanganate?

Instruction for this given problem (1.)

1. All answers to be entered via short answer are in the NUMERICAL FORMAT and presented up to the 3rd decimal place. ADD TRAILING ZEROS if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT for now.

For uniformity of answers, please be guided by the following examples:
- If your answer is 5.627594, enter 5.628
- If your answer is 3.129934, enter 3.130
- If your answer is 8.38, enter 8.380
- If your answer is 1.2, enter 1.200
- If your answer is 25, enter 25.000
- If your answer is less than the value of 1, always place a zero before the decimal point (E.g.: if 0.5, enter 0.500)

2. In cases for answers in the EXPONENTIAL FORMAT, please be guided by the following examples and format:
- Do not convert your answer to decimal format
- If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between)
- If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between)

3. The ATOMIC MASSES should be rounded to the NEAREST WHOLE NUMBER. (E.g. Hydrogen: 1.00784 = 1.000)

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