Type The Correct Answer In Each Box.Which Chemical Symbols Will Complete The Equation For This Decomposition Reaction?$\[ 2 \, \text{KI} \rightarrow 2 \, \square + \square_2 \\]

Feb 26, 2025 by ADMIN 178 views

**Decomposition Reaction: Identifying Chemical Symbols**

Understanding Decomposition Reactions

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances. In this reaction, the compound decomposes into two products. The equation for a decomposition reaction is typically written as:

${ \text{A} \rightarrow \text{B} + \text{C} }$

Where A is the reactant, and B and C are the products.

Given Equation: Identifying Chemical Symbols

The given equation is:

${ 2 \, \text{KI} \rightarrow 2 \, \square + \square_2 }$

To identify the chemical symbols that will complete the equation, we need to understand the reactant and the products.

Reactant: Potassium Iodide (KI)

The reactant in the given equation is potassium iodide (KI). Potassium iodide is a chemical compound composed of potassium (K) and iodine (I). The chemical formula for potassium iodide is KI.

Products: Identifying Chemical Symbols

The products in the given equation are represented by the symbols ${\square}$ and ${\square_2}$ . To identify the chemical symbols that will complete the equation, we need to consider the possible decomposition products of potassium iodide.

Possible Decomposition Products

Potassium iodide (KI) can decompose into potassium (K) and iodine (I). However, the given equation suggests that the products are not just potassium and iodine, but rather two different substances.

Identifying the Chemical Symbols

Based on the possible decomposition products, we can identify the chemical symbols that will complete the equation. The first product, represented by the symbol ${\square}$ , is likely to be potassium (K). The second product, represented by the symbol ${\square_2}$ , is likely to be iodine (I).

Completed Equation

The completed equation for the decomposition reaction is:

${ 2 \, \text{KI} \rightarrow 2 \, \text{K} + \text{I}_2 }$

Conclusion

In conclusion, the chemical symbols that will complete the equation for the decomposition reaction are K and I2. The reactant, potassium iodide (KI), decomposes into potassium (K) and iodine (I2).

Key Takeaways

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances.
The given equation is a decomposition reaction where potassium iodide (KI) decomposes into potassium (K) and iodine (I2).
The chemical symbols that will complete the equation are K and I2.

Frequently Asked Questions

What is a decomposition reaction? A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances.
What is the reactant in the given equation? The reactant in the given equation is potassium iodide (KI).
What are the products in the given equation? The products in the given equation are potassium (K) and iodine (I2).

Additional Resources

For more information on decomposition reactions, visit the American Chemical Society website.
For more information on chemical symbols, visit the International Union of Pure and Applied Chemistry website.

References

American Chemical Society. (n.d.). Decomposition Reactions.
International Union of Pure and Applied Chemistry. (n.d.). Chemical Symbols.

Glossary

Decomposition reaction: A type of chemical reaction where a single compound breaks down into two or more simpler substances.
Reactant: The substance that undergoes a chemical reaction.
Product: The substance that is formed as a result of a chemical reaction.
Chemical symbol: A unique abbreviation used to represent a chemical element or compound.

Q1: What is a decomposition reaction?

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances. In this reaction, the compound decomposes into two or more products.

Q2: What is the difference between a decomposition reaction and a synthesis reaction?

A synthesis reaction is a type of chemical reaction where two or more substances combine to form a new compound. In contrast, a decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances.

Q3: What is the reactant in a decomposition reaction?

The reactant in a decomposition reaction is the substance that undergoes a chemical reaction. In the case of the given equation, the reactant is potassium iodide (KI).

Q4: What are the products in a decomposition reaction?

The products in a decomposition reaction are the substances that are formed as a result of the chemical reaction. In the case of the given equation, the products are potassium (K) and iodine (I2).

Q5: How do you write a balanced chemical equation for a decomposition reaction?

To write a balanced chemical equation for a decomposition reaction, you need to ensure that the number of atoms of each element is the same on both the reactant and product sides of the equation. In the case of the given equation, the balanced chemical equation is:

${ 2 \, \text{KI} \rightarrow 2 \, \text{K} + \text{I}_2 }$

Q6: What is the role of catalysts in decomposition reactions?

Catalysts are substances that speed up chemical reactions without being consumed or altered in the process. In decomposition reactions, catalysts can help to lower the activation energy required for the reaction to occur, making it faster and more efficient.

Q7: Can decomposition reactions be reversible?

Yes, decomposition reactions can be reversible. In some cases, the products of a decomposition reaction can react with each other to form the original reactant. This is known as a reversible reaction.

Q8: What are some common examples of decomposition reactions?

Some common examples of decomposition reactions include:

The decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2)
The decomposition of ammonia (NH3) into nitrogen (N2) and hydrogen (H2)
The decomposition of potassium iodide (KI) into potassium (K) and iodine (I2)

Q9: How do you predict the products of a decomposition reaction?

To predict the products of a decomposition reaction, you need to consider the possible decomposition products of the reactant. This can be done by analyzing the chemical structure of the reactant and identifying the possible bonds that can be broken.

Q10: What are some common mistakes to avoid when writing a balanced chemical equation for a decomposition reaction?

Some common mistakes to avoid when writing a balanced chemical equation for a decomposition reaction include:

Not ensuring that the number of atoms of each element is the same on both the reactant and product sides of the equation
Not considering the possible decomposition products of the reactant
Not using the correct chemical symbols and formulas for the reactant and products