Best Value for % Purity How did you arrive at the best value?

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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I want the best value for percent purity and how did you arrive at the best value 

**Part II: Synthesized Aspirin**

**Trial 1**

- Mass of aspirin (g): 0.486 g
- Theoretical moles: 2.70 x 10^-3 mol

**Trial 2**

- Mass of aspirin (g): 0.485 g
- Theoretical moles: 2.69 x 10^-3 mol

**Calculations for Theoretical Moles:**

- **Trial 1:** 
  - \(0.486 \, \text{g asp} \times \frac{1.00 \, \text{mol}}{180.16 \, \text{g asp}} = 2.70 \times 10^{-3} \, \text{mol}\)

- **Trial 2:** 
  - \(0.485 \, \text{g asp} \times \frac{1.00 \, \text{mol}}{180.16 \, \text{g asp}} = 2.69 \times 10^{-3} \, \text{mol}\)

**Molarity of NaOH:**
- 0.216 mol/L

**Volume of NaOH used (mL):**

- **Trial 1:** 11.85 mL
- **Trial 2:** 12.99 mL

**Color of Solution:**

- **Trial 1:** Medium/dark pink color
- **Trial 2:** Darker pink color than Trial 1

**Moles of NaOH used:**

- **Trial 1:** 0.00256 moles NaOH
- **Trial 2:** 0.0028 moles NaOH

**Calculations for Moles of NaOH:**

- **Trial 1:** \(0.216 \, \text{mol/L} \times 0.01185 \, \text{L NaOH} = 0.00256 \, \text{moles NaOH}\)
- **Trial 2:** \(0.216 \, \text{mol/L} \times 0.01299 \, \text{L NaOH} = 0.0028 \, \text{moles NaOH}\)
Transcribed Image Text:**Part II: Synthesized Aspirin** **Trial 1** - Mass of aspirin (g): 0.486 g - Theoretical moles: 2.70 x 10^-3 mol **Trial 2** - Mass of aspirin (g): 0.485 g - Theoretical moles: 2.69 x 10^-3 mol **Calculations for Theoretical Moles:** - **Trial 1:** - \(0.486 \, \text{g asp} \times \frac{1.00 \, \text{mol}}{180.16 \, \text{g asp}} = 2.70 \times 10^{-3} \, \text{mol}\) - **Trial 2:** - \(0.485 \, \text{g asp} \times \frac{1.00 \, \text{mol}}{180.16 \, \text{g asp}} = 2.69 \times 10^{-3} \, \text{mol}\) **Molarity of NaOH:** - 0.216 mol/L **Volume of NaOH used (mL):** - **Trial 1:** 11.85 mL - **Trial 2:** 12.99 mL **Color of Solution:** - **Trial 1:** Medium/dark pink color - **Trial 2:** Darker pink color than Trial 1 **Moles of NaOH used:** - **Trial 1:** 0.00256 moles NaOH - **Trial 2:** 0.0028 moles NaOH **Calculations for Moles of NaOH:** - **Trial 1:** \(0.216 \, \text{mol/L} \times 0.01185 \, \text{L NaOH} = 0.00256 \, \text{moles NaOH}\) - **Trial 2:** \(0.216 \, \text{mol/L} \times 0.01299 \, \text{L NaOH} = 0.0028 \, \text{moles NaOH}\)
**Percent Purity of Aspirin (%):**

- **99.41**

**Example Calculation:**
\[ \frac{0.4833 \, \text{g asp}}{0.4862} \times 100 = 99.41\% \]

**Best Value for % Purity:**  
__________________

**How did you arrive at the best value?**  
__________________

**Part III - Commercial Aspirin**

- **Trial 1:**
  - **Mass of Aspirin Tablet (g):**  
    \[ 0.371g \]

  - **Theoretical Moles in Tablet:**  
    \[ 2.06 \times 10^{-3} \]
Transcribed Image Text:**Percent Purity of Aspirin (%):** - **99.41** **Example Calculation:** \[ \frac{0.4833 \, \text{g asp}}{0.4862} \times 100 = 99.41\% \] **Best Value for % Purity:** __________________ **How did you arrive at the best value?** __________________ **Part III - Commercial Aspirin** - **Trial 1:** - **Mass of Aspirin Tablet (g):** \[ 0.371g \] - **Theoretical Moles in Tablet:** \[ 2.06 \times 10^{-3} \]
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