Lead ions can be precipitated from solution with KCl according to the reaction: Pb²+ (aq) + 2KCl(aq) → PbCl₂ (s) + 2K+ (aq) When 34.3 g KCl is added to a solution containing 25.8 g Pb2+, PbCl2 (s) forms. The solid is filtered and dried and found to have a mass of 30.9 g. theoretical yield of PbCl2 = 25.8 g Ph Part C % yield = X Determine the percent yield for the reaction. Express your answer in percent to three significant figures. ΠΫΠΙ ΑΣΦ 1 mol Pb2+ 1 mol 1 met X 207.2 g Pb²+ 2 ? %
Lead ions can be precipitated from solution with KCl according to the reaction: Pb²+ (aq) + 2KCl(aq) → PbCl₂ (s) + 2K+ (aq) When 34.3 g KCl is added to a solution containing 25.8 g Pb2+, PbCl2 (s) forms. The solid is filtered and dried and found to have a mass of 30.9 g. theoretical yield of PbCl2 = 25.8 g Ph Part C % yield = X Determine the percent yield for the reaction. Express your answer in percent to three significant figures. ΠΫΠΙ ΑΣΦ 1 mol Pb2+ 1 mol 1 met X 207.2 g Pb²+ 2 ? %
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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![### Precipitation of Lead Ions
Lead ions can be precipitated from a solution with KCl according to the reaction:
\[ \text{Pb}^{2+} \text{(aq)} + 2\text{KCl(aq)} \rightarrow \text{PbCl}_2 \text{(s)} + 2\text{K}^+ \text{(aq)} \]
### Reaction Details
When 34.3 g of KCl is added to a solution containing 25.8 g of \(\text{Pb}^{2+}\), PbCl₂(s) forms. The solid is filtered and dried, and it is found to have a mass of 30.9 g.
### Calculating Percent Yield
**Part C: Determine the percent yield for the reaction.**
Express your answer in percent to three significant figures.
#### Formula for Percent Yield
\[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100 \]
#### Given Data
- Actual Yield: 30.9 g
- **Theoretical Yield** (provided above): 25.8 g
**Calculation:**
1. **Identify the masses of reagents and products:**
- Actual yield of PbCl₂(s): 30.9 g
- Theoretical yield of PbCl₂(s): 25.8 g
2. **Determine the percent yield:**
\[
\text{Percent Yield} = \left( \frac{30.9 \, \text{g}}{25.8 \, \text{g}} \right) \times 100 \approx 119.77\%
\]
3. **Round to three significant figures:**
\[
\text{Percent Yield} \approx 119.8\%
\]
**Inputs for Calculation:**
\[
\text{\% yield} = \boxed{ \quad } \%
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Transcribed Image Text:### Precipitation of Lead Ions
Lead ions can be precipitated from a solution with KCl according to the reaction:
\[ \text{Pb}^{2+} \text{(aq)} + 2\text{KCl(aq)} \rightarrow \text{PbCl}_2 \text{(s)} + 2\text{K}^+ \text{(aq)} \]
### Reaction Details
When 34.3 g of KCl is added to a solution containing 25.8 g of \(\text{Pb}^{2+}\), PbCl₂(s) forms. The solid is filtered and dried, and it is found to have a mass of 30.9 g.
### Calculating Percent Yield
**Part C: Determine the percent yield for the reaction.**
Express your answer in percent to three significant figures.
#### Formula for Percent Yield
\[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100 \]
#### Given Data
- Actual Yield: 30.9 g
- **Theoretical Yield** (provided above): 25.8 g
**Calculation:**
1. **Identify the masses of reagents and products:**
- Actual yield of PbCl₂(s): 30.9 g
- Theoretical yield of PbCl₂(s): 25.8 g
2. **Determine the percent yield:**
\[
\text{Percent Yield} = \left( \frac{30.9 \, \text{g}}{25.8 \, \text{g}} \right) \times 100 \approx 119.77\%
\]
3. **Round to three significant figures:**
\[
\text{Percent Yield} \approx 119.8\%
\]
**Inputs for Calculation:**
\[
\text{\% yield} = \boxed{ \quad } \%
\]

Transcribed Image Text:Magnesium oxide can be made by heating
magnesium metal in the presence of the oxygen. The
balanced equation for the reaction is:
2Mg(s) + O2(g) → 2MgO(s)
When 12.9 g Mg reacts with 14.0 g O2, 12.5 g MgO
is collected.
The theoretical yield is determined from the limiting reactant. The mass of Mg
moles of MgO to grams of MgO.
- Part C
Determine the percent yield for the reaction.
Express your answer as a percent.
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