Identifying the Reactant in the Solid State

Oct 13, 2025 by miodeya.com 42 views

Understanding the Chemical Equation

The chemical equation $BaCO_3(s) + HNO_3(l) \rightarrow Ba(NO_3)_2(aq) + CO_2(g) + H_2O(l)$ describes a reaction between barium carbonate and nitric acid. This equation is a representation of the chemical process that occurs when these two substances interact. In this article, we will focus on identifying the reactant in the solid state.

What are Reactants?

Reactants are the substances that are present at the beginning of a chemical reaction. They are the starting materials that undergo a chemical change to form new substances. In the given equation, barium carbonate and nitric acid are the reactants.

Identifying the Reactant in the Solid State

The question asks which statement most accurately identifies a reactant in the solid state. To answer this question, we need to examine the given equation and identify the substance that is in the solid state.

The Substance in the Solid State

In the given equation, $BaCO_3(s)$ represents barium carbonate in the solid state. The "(s)" symbol indicates that barium carbonate is a solid substance. Therefore, the statement that most accurately identifies a reactant in the solid state is:

A. $BaCO_3(s)$

Why is Barium Carbonate a Reactant?

Barium carbonate is a reactant because it is present at the beginning of the chemical reaction. It is the starting material that undergoes a chemical change to form new substances. In this case, barium carbonate reacts with nitric acid to form barium nitrate, carbon dioxide, and water.

The Role of Nitric Acid

Nitric acid is also a reactant in this chemical reaction. It is the other starting material that reacts with barium carbonate to form new substances. However, the question specifically asks about the reactant in the solid state, which is barium carbonate.

Conclusion

In conclusion, the statement that most accurately identifies a reactant in the solid state is A. $BaCO_3(s)$ . This is because barium carbonate is the substance that is present in the solid state and undergoes a chemical change to form new substances.

Understanding Chemical Equations

Chemical equations are a representation of the chemical process that occurs when substances interact. They provide valuable information about the reactants, products, and conditions required for a chemical reaction to occur. In this article, we have focused on identifying the reactant in the solid state in a given chemical equation.

Key Takeaways

Reactants are the substances that are present at the beginning of a chemical reaction.
Barium carbonate is a reactant in the solid state in the given chemical equation.
The "(s)" symbol indicates that a substance is in the solid state.
Chemical equations provide valuable information about the reactants, products, and conditions required for a chemical reaction to occur.

References

Appendix

The following is a list of common chemical symbols and their meanings:

(s) - solid state
(l) - liquid state
(aq) - aqueous solution
(g) - gas state

Frequently Asked Questions

In this article, we will answer some frequently asked questions about chemical equations and reactions. These questions cover a range of topics, from the basics of chemical equations to more advanced concepts.

Q1: What is a chemical equation?

A chemical equation is a representation of the chemical process that occurs when substances interact. It provides valuable information about the reactants, products, and conditions required for a chemical reaction to occur.

Q2: What are reactants and products in a chemical equation?

Reactants are the substances that are present at the beginning of a chemical reaction. They are the starting materials that undergo a chemical change to form new substances. Products are the substances that are formed as a result of the chemical reaction.

Q3: How do I write a chemical equation?

To write a chemical equation, you need to identify the reactants and products involved in the reaction. You should then write the reactants on the left side of the equation and the products on the right side. Use arrows to indicate the direction of the reaction.

Q4: What is the difference between a balanced and unbalanced chemical equation?

A balanced chemical equation is one in which the number of atoms of each element is the same on both the reactant and product sides. An unbalanced chemical equation is one in which the number of atoms of each element is not the same on both sides.

Q5: How do I balance a chemical equation?

To balance a chemical equation, you need to add coefficients to the reactants and products to ensure that the number of atoms of each element is the same on both sides. You can use the following steps to balance a chemical equation:

Count the number of atoms of each element on both the reactant and product sides.
Identify the elements that have a different number of atoms on both sides.
Add coefficients to the reactants and products to balance the equation.

Q6: What is the significance of the coefficients in a balanced chemical equation?

The coefficients in a balanced chemical equation represent the number of molecules of each substance that are involved in the reaction. They provide valuable information about the stoichiometry of the reaction.

Q7: How do I determine the number of moles of a substance in a chemical reaction?

To determine the number of moles of a substance in a chemical reaction, you need to know the molar mass of the substance and the number of molecules of the substance that are involved in the reaction. You can use the following formula to calculate the number of moles:

moles = (number of molecules) / (Avogadro's number)

Q8: What is the difference between a chemical reaction and a physical change?

A chemical reaction is a process in which one or more substances are converted into new substances. A physical change is a process in which a substance changes its state or properties, but its chemical composition remains the same.

Q9: How do I determine whether a reaction is exothermic or endothermic?

To determine whether a reaction is exothermic or endothermic, you need to look at the energy change that occurs during the reaction. If the reaction releases energy, it is exothermic. If the reaction absorbs energy, it is endothermic.

Q10: What is the significance of the activation energy in a chemical reaction?

The activation energy is the minimum amount of energy that is required for a chemical reaction to occur. It is a critical factor in determining the rate of the reaction.

Conclusion

In conclusion, chemical equations and reactions are fundamental concepts in chemistry. Understanding these concepts is essential for predicting the outcomes of chemical reactions and designing new chemical processes. We hope that this Q&A article has provided you with a better understanding of these concepts.

References

Appendix

The following is a list of common chemical symbols and their meanings:

(s) - solid state
(l) - liquid state
(aq) - aqueous solution
(g) - gas state

This list is not exhaustive, but it provides a starting point for understanding common chemical symbols.