Pre-lab question #6-1: Calculate the percent (%) C2042- in H2C204. 53.0 57.1 65.7 97.8

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Pre-laboratory Exercise: Percentage Calculation**

**Question #6-1: Calculate the percent (%) of C₂O₄²⁻ in H₂C₂O₄.**

Please choose the correct answer from the options below:

- [ ]

  53.0

- [ ]

  57.1

- [ ]

  65.7

- [ ]

  97.8

---

This exercise encourages students to apply their knowledge of chemistry to calculate the percentage composition of the oxalate ion (C₂O₄²⁻) in oxalic acid (H₂C₂O₄). Understanding how to calculate the percent composition is an essential skill for various chemistry applications, including solution preparation and chemical reaction analysis.

**Step-by-Step Solution Approach**
1. Calculate the molar mass of C₂O₄²⁻.
2. Calculate the molar mass of H₂C₂O₄.
3. Use the formula: \[(\text{Molar mass of C₂O₄²⁻} / \text{Molar mass of H₂C₂O₄}) \times 100\%\]
4. Compare the result with the given options.

Make sure to have your periodic table and calculator ready. This exercise aids in grasping the practical aspects of chemical formulae and molecular weights, a crucial aspect for any chemistry student.
Transcribed Image Text:**Pre-laboratory Exercise: Percentage Calculation** **Question #6-1: Calculate the percent (%) of C₂O₄²⁻ in H₂C₂O₄.** Please choose the correct answer from the options below: - [ ]   53.0 - [ ]   57.1 - [ ]   65.7 - [ ]   97.8 --- This exercise encourages students to apply their knowledge of chemistry to calculate the percentage composition of the oxalate ion (C₂O₄²⁻) in oxalic acid (H₂C₂O₄). Understanding how to calculate the percent composition is an essential skill for various chemistry applications, including solution preparation and chemical reaction analysis. **Step-by-Step Solution Approach** 1. Calculate the molar mass of C₂O₄²⁻. 2. Calculate the molar mass of H₂C₂O₄. 3. Use the formula: \[(\text{Molar mass of C₂O₄²⁻} / \text{Molar mass of H₂C₂O₄}) \times 100\%\] 4. Compare the result with the given options. Make sure to have your periodic table and calculator ready. This exercise aids in grasping the practical aspects of chemical formulae and molecular weights, a crucial aspect for any chemistry student.
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