Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Certainly! Here's a transcription and explanation of the document as it might appear on an educational website:

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**Chemistry Lab Report Sheet**

**PART I: Write observations and complete molecular equations for each reaction. Identify the precipitant using the solubility chart.**

**A1:** 
- **Observation:** White ppt forms.
- **Explanation:** In this reaction, \( \text{CaCO}_3 \) is insoluble in solution as per the given chart, so it is precipitated as white ppt.
- **Equation:** \( \text{Ca(NO}_3)_2 + \text{Na}_2\text{CO}_3 \rightarrow \text{CaCO}_3(s) + 2\text{NaNO}_3 \)

**A2:** 
- **Observation:** White cloudy ppt forms.
- **Explanation:** In this reaction, only \( \text{Mg(OH)}_2 \) is insoluble so its cloudy ppts are formed.
- **Equation:** \( \text{MgSO}_4 + 2\text{NaOH} \rightarrow \text{Mg(OH)}_2(s) + \text{Na}_2\text{SO}_4 \)

**A3:** 
- **Observation:** Solution remains clear.
- **Explanation:** In this reaction, all salts are soluble hence no change or no ppt is observed.
- **Equation:** \( \text{NaNO}_3 + \text{KCl} \rightarrow \text{KNO}_3 + \text{NaCl} \)

**B1:** 
- **Observation:** Phenolphthalein is pink in presence of NaOH. It will become colorless as HCl is added.
- **Explanation:** Phenolphthalein is a pH indicator that turns pink in basic solutions and colorless in acidic solutions.

--- 

This transcription provides a logical flow and explanation for each reaction based on the solubility of the compounds involved, useful for educational purposes.
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Transcribed Image Text:Certainly! Here's a transcription and explanation of the document as it might appear on an educational website: --- **Chemistry Lab Report Sheet** **PART I: Write observations and complete molecular equations for each reaction. Identify the precipitant using the solubility chart.** **A1:** - **Observation:** White ppt forms. - **Explanation:** In this reaction, \( \text{CaCO}_3 \) is insoluble in solution as per the given chart, so it is precipitated as white ppt. - **Equation:** \( \text{Ca(NO}_3)_2 + \text{Na}_2\text{CO}_3 \rightarrow \text{CaCO}_3(s) + 2\text{NaNO}_3 \) **A2:** - **Observation:** White cloudy ppt forms. - **Explanation:** In this reaction, only \( \text{Mg(OH)}_2 \) is insoluble so its cloudy ppts are formed. - **Equation:** \( \text{MgSO}_4 + 2\text{NaOH} \rightarrow \text{Mg(OH)}_2(s) + \text{Na}_2\text{SO}_4 \) **A3:** - **Observation:** Solution remains clear. - **Explanation:** In this reaction, all salts are soluble hence no change or no ppt is observed. - **Equation:** \( \text{NaNO}_3 + \text{KCl} \rightarrow \text{KNO}_3 + \text{NaCl} \) **B1:** - **Observation:** Phenolphthalein is pink in presence of NaOH. It will become colorless as HCl is added. - **Explanation:** Phenolphthalein is a pH indicator that turns pink in basic solutions and colorless in acidic solutions. --- This transcription provides a logical flow and explanation for each reaction based on the solubility of the compounds involved, useful for educational purposes.
In Part I (A) reactions, how did you decide what (compound) precipitated?
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Transcribed Image Text:In Part I (A) reactions, how did you decide what (compound) precipitated?
Expert Solution
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Step 1

In each of the cases in Part I (A), the precipitated compound is predicted.

 

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