1. What is the molecular formula for the unknown hydrate?2. What is the percent mass of water in CaSO4•2H2O? Show your calculations.3. Not drying the crucible after washing is a bad mistake. For Part B: If the empty crucible is not heated long enough tocompletely dry it prior to weighing what will be the effect on the calculated percent water in the unknown? (larger orsmaller than the actual value). Explain your answer as clearly as possible.4. Explain the purpose of the desiccator. How would your results differ if you didn’t use it? ### Experimental Data and Calculations for Hydrate AnalysisThis table presents the data and calculations related to the analysis of a hydrated compound using mass measurements. #### Collected Data:1. **Mass of Crucible (g):** - Trial 1: 17.89 - Trial 2: 19.87 - Trial 3: 19.622. **Mass of Crucible + Hydrate (g):** - Trial 1: 18.60 - Trial 2: 20.44 - Trial 3: 20.363. **Mass of Crucible + Anhydrate (g):** - Trial 1: 18.29 - Trial 2: 20.21 - Trial 3: 20.02#### Calculations:- **Mass of Anhydrate (g):** - Trial 1: 0.40 - Trial 2: 0.34 - Trial 3: 0.40- **Moles of Anhydrate:** - Trial 1: 0.002581 - Trial 2: 0.002194 - Trial 3: 0.00258- **Mass of Water Eliminated (g):** - Trial 1: 0.31 - Trial 2: 0.23 - Trial 3: 0.34- **Moles of Water:** - Trial 1: 0.017203 - Trial 2: 0.012764 - Trial 3: 0.018887- **Moles of Water per CoSO₄:** - Trial 1: 6.666032 - Trial 2: 5.818548 - Trial 3: 7.31113### AnalysisThe data includes three trials, with calculations made for each trial on the number of moles of water per mole of the anhydrate. This information can be used to determine the hydration number of a compound like CoSO₄ by comparing the ratio of moles of water to moles of anhydrate.This method involves heating the hydrate to remove water, measuring the residues, and calculating the differences to find water content. This kind of quantitative analysis is crucial for determining the

The molecular formula for the unknown hydrate is to be determined from the given experimental data.…

Answered: 1. What is the molecular formula for…

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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1. What is the molecular formula for the unknown hydrate?
2. What is the percent mass of water in CaSO4•2H2O? Show your calculations.
3. Not drying the crucible after washing is a bad mistake. For Part B: If the empty crucible is not heated long enough to
completely dry it prior to weighing what will be the effect on the calculated percent water in the unknown? (larger or
smaller than the actual value). Explain your answer as clearly as possible.
4. Explain the purpose of the desiccator. How would your results differ if you didn’t use it?

### Experimental Data and Calculations for Hydrate Analysis

This table presents the data and calculations related to the analysis of a hydrated compound using mass measurements.

#### Collected Data:

1. **Mass of Crucible (g):**
- Trial 1: 17.89
- Trial 2: 19.87
- Trial 3: 19.62

2. **Mass of Crucible + Hydrate (g):**
- Trial 1: 18.60
- Trial 2: 20.44
- Trial 3: 20.36

3. **Mass of Crucible + Anhydrate (g):**
- Trial 1: 18.29
- Trial 2: 20.21
- Trial 3: 20.02

#### Calculations:

- **Mass of Anhydrate (g):**
- Trial 1: 0.40
- Trial 2: 0.34
- Trial 3: 0.40

- **Moles of Anhydrate:**
- Trial 1: 0.002581
- Trial 2: 0.002194
- Trial 3: 0.00258

- **Mass of Water Eliminated (g):**
- Trial 1: 0.31
- Trial 2: 0.23
- Trial 3: 0.34

- **Moles of Water:**
- Trial 1: 0.017203
- Trial 2: 0.012764
- Trial 3: 0.018887

- **Moles of Water per CoSO₄:**
- Trial 1: 6.666032
- Trial 2: 5.818548
- Trial 3: 7.31113

### Analysis

The data includes three trials, with calculations made for each trial on the number of moles of water per mole of the anhydrate. This information can be used to determine the hydration number of a compound like CoSO₄ by comparing the ratio of moles of water to moles of anhydrate.

This method involves heating the hydrate to remove water, measuring the residues, and calculating the differences to find water content. This kind of quantitative analysis is crucial for determining the

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