Type The Correct Answer In The Box. Express Your Answer To Two Significant Figures.You Are Performing A Reaction With 1.7 Moles Of Hydroiodic Acid And 3.43 Moles Of Zinc Bromide:$\[ 2 \text{HI} + \text{ZnBr}_2 \rightarrow 2 \text{HBr} +
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Introduction
In chemistry, a limiting reactant is the reactant that is consumed first in a chemical reaction, and it determines the maximum amount of product that can be formed. Identifying the limiting reactant is crucial in understanding the stoichiometry of a reaction and predicting the yield of the product. In this article, we will discuss how to identify the limiting reactant in a chemical reaction using the example of a reaction between hydroiodic acid (HI) and zinc bromide (ZnBr2).
The Reaction
The reaction between hydroiodic acid (HI) and zinc bromide (ZnBr2) is as follows:
Given Information
We are given 1.7 moles of hydroiodic acid (HI) and 3.43 moles of zinc bromide (ZnBr2). We need to determine the limiting reactant and express our answer to two significant figures.
Stoichiometry of the Reaction
To determine the limiting reactant, we need to understand the stoichiometry of the reaction. The balanced equation shows that 2 moles of HI react with 1 mole of ZnBr2 to produce 2 moles of HBr and 1 mole of ZnI2. This means that the mole ratio of HI to ZnBr2 is 2:1.
Calculating the Limiting Reactant
To determine the limiting reactant, we need to calculate the number of moles of HI and ZnBr2 that would react to produce 1 mole of product. Let's assume that we want to produce 1 mole of HBr.
From the balanced equation, we can see that 2 moles of HI produce 2 moles of HBr. Therefore, the number of moles of HI required to produce 1 mole of HBr is 1 mole.
Similarly, from the balanced equation, we can see that 1 mole of ZnBr2 produces 2 moles of HBr. Therefore, the number of moles of ZnBr2 required to produce 1 mole of HBr is 0.5 moles.
Comparing the Mole Ratios
Now that we have calculated the number of moles of HI and ZnBr2 required to produce 1 mole of HBr, we can compare the mole ratios.
The mole ratio of HI to ZnBr2 required to produce 1 mole of HBr is 1:0.5, which is equivalent to 2:1.
The mole ratio of HI to ZnBr2 available is 1.7:3.43, which is equivalent to 0.5:1.3.
Conclusion
Based on the calculations, we can see that the mole ratio of HI to ZnBr2 required to produce 1 mole of HBr is 2:1, while the mole ratio of HI to ZnBr2 available is 0.5:1.3. This means that ZnBr2 is the limiting reactant, and it will be consumed first in the reaction.
Calculating the Yield of the Product
Since ZnBr2 is the limiting reactant, we can calculate the yield of the product (HBr) using the number of moles of ZnBr2 available.
The number of moles of ZnBr2 available is 3.43 moles.
From the balanced equation, we can see that 1 mole of ZnBr2 produces 2 moles of HBr. Therefore, the number of moles of HBr produced will be 2 x 3.43 = 6.86 moles.
Expressing the Answer to Two Significant Figures
The number of moles of HBr produced is 6.86 moles. To express this answer to two significant figures, we can round it to 6.9 moles.
Therefore, the limiting reactant in the reaction between hydroiodic acid (HI) and zinc bromide (ZnBr2) is ZnBr2, and the yield of the product (HBr) is 6.9 moles.
Conclusion
In conclusion, identifying the limiting reactant in a chemical reaction is crucial in understanding the stoichiometry of the reaction and predicting the yield of the product. By comparing the mole ratios of the reactants and using the balanced equation, we can determine the limiting reactant and calculate the yield of the product. In this article, we have discussed how to identify the limiting reactant in a chemical reaction using the example of a reaction between hydroiodic acid (HI) and zinc bromide (ZnBr2).
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Introduction
In our previous article, we discussed how to identify the limiting reactant in a chemical reaction using the example of a reaction between hydroiodic acid (HI) and zinc bromide (ZnBr2). In this article, we will provide a Q&A guide to help you understand the concept of limiting reactant and how to apply it in different scenarios.
Q1: What is a limiting reactant?
A limiting reactant is the reactant that is consumed first in a chemical reaction, and it determines the maximum amount of product that can be formed.
Q2: How do I determine the limiting reactant in a chemical reaction?
To determine the limiting reactant, you need to compare the mole ratios of the reactants and use the balanced equation to calculate the number of moles of each reactant required to produce 1 mole of product.
Q3: What is the mole ratio of the reactants in a chemical reaction?
The mole ratio of the reactants is the ratio of the number of moles of each reactant to the number of moles of the other reactant.
Q4: How do I calculate the number of moles of each reactant required to produce 1 mole of product?
To calculate the number of moles of each reactant required to produce 1 mole of product, you need to use the balanced equation and the mole ratio of the reactants.
Q5: What is the difference between a limiting reactant and an excess reactant?
A limiting reactant is the reactant that is consumed first in a chemical reaction, while an excess reactant is the reactant that is left over after the reaction is complete.
Q6: How do I determine if a reactant is a limiting reactant or an excess reactant?
To determine if a reactant is a limiting reactant or an excess reactant, you need to compare the mole ratios of the reactants and use the balanced equation to calculate the number of moles of each reactant required to produce 1 mole of product.
Q7: What is the significance of identifying the limiting reactant in a chemical reaction?
Identifying the limiting reactant in a chemical reaction is crucial in understanding the stoichiometry of the reaction and predicting the yield of the product.
Q8: How do I calculate the yield of the product in a chemical reaction?
To calculate the yield of the product in a chemical reaction, you need to use the number of moles of the limiting reactant and the balanced equation to calculate the number of moles of the product.
Q9: What is the difference between a limiting reactant and a reactant that is not limiting?
A limiting reactant is the reactant that is consumed first in a chemical reaction, while a reactant that is not limiting is the reactant that is not consumed first in the reaction.
Q10: How do I determine if a reactant is a limiting reactant or a reactant that is not limiting?
To determine if a reactant is a limiting reactant or a reactant that is not limiting, you need to compare the mole ratios of the reactants and use the balanced equation to calculate the number of moles of each reactant required to produce 1 mole of product.
Conclusion
In conclusion, identifying the limiting reactant in a chemical reaction is crucial in understanding the stoichiometry of the reaction and predicting the yield of the product. By comparing the mole ratios of the reactants and using the balanced equation, you can determine the limiting reactant and calculate the yield of the product. We hope that this Q&A guide has helped you understand the concept of limiting reactant and how to apply it in different scenarios.
Additional Resources
For more information on limiting reactant, you can refer to the following resources:
Final Thoughts
Identifying the limiting reactant in a chemical reaction is a crucial step in understanding the stoichiometry of the reaction and predicting the yield of the product. By comparing the mole ratios of the reactants and using the balanced equation, you can determine the limiting reactant and calculate the yield of the product. We hope that this Q&A guide has helped you understand the concept of limiting reactant and how to apply it in different scenarios.