Describe the relationship of ions and conductivity. Explain the concept of excess reactant, limiting reactant, theoretical yield, actual yield and % yield.

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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**Understanding the Relationship Between Ions and Conductivity**

Conductivity is a measure of a solution's ability to conduct electricity, which is facilitated by the presence of ions. Ions are charged particles formed when an ionic compound dissolves in a solvent, typically water. The mobility and concentration of these ions directly affect the conductivity of the solution. More ions result in higher conductivity, while fewer ions lower it.

**Key Concepts in Chemical Reactions:**

1. **Excess Reactant**: This is the reactant that remains after a chemical reaction has reached completion. It is available in a larger quantity than necessary to completely react with the limiting reactant.

2. **Limiting Reactant**: The reactant that is entirely consumed during a chemical reaction, thereby determining the maximum amount of product that can be formed. The limiting reactant controls the extent of the reaction.

3. **Theoretical Yield**: This is the maximum amount of product that could be formed from a given quantity of reactants, calculated based on stoichiometric ratios from the balanced chemical equation.

4. **Actual Yield**: The actual quantity of product obtained from a chemical reaction. It is often less than the theoretical yield due to factors like side reactions, incomplete reactions, or loss during recovery.

5. **Percent Yield**: A metric used to evaluate the efficiency of a reaction, calculated by the formula:

   \[
   \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100\%
   \]

Understanding these concepts is crucial in optimizing reactions and maximizing product formation in chemical processes.
Transcribed Image Text:**Understanding the Relationship Between Ions and Conductivity** Conductivity is a measure of a solution's ability to conduct electricity, which is facilitated by the presence of ions. Ions are charged particles formed when an ionic compound dissolves in a solvent, typically water. The mobility and concentration of these ions directly affect the conductivity of the solution. More ions result in higher conductivity, while fewer ions lower it. **Key Concepts in Chemical Reactions:** 1. **Excess Reactant**: This is the reactant that remains after a chemical reaction has reached completion. It is available in a larger quantity than necessary to completely react with the limiting reactant. 2. **Limiting Reactant**: The reactant that is entirely consumed during a chemical reaction, thereby determining the maximum amount of product that can be formed. The limiting reactant controls the extent of the reaction. 3. **Theoretical Yield**: This is the maximum amount of product that could be formed from a given quantity of reactants, calculated based on stoichiometric ratios from the balanced chemical equation. 4. **Actual Yield**: The actual quantity of product obtained from a chemical reaction. It is often less than the theoretical yield due to factors like side reactions, incomplete reactions, or loss during recovery. 5. **Percent Yield**: A metric used to evaluate the efficiency of a reaction, calculated by the formula: \[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100\% \] Understanding these concepts is crucial in optimizing reactions and maximizing product formation in chemical processes.
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