Answered

Discover a world of knowledge at Westonci.ca, where experts and enthusiasts come together to answer your questions. Get immediate and reliable solutions to your questions from a community of experienced experts on our Q&A platform. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

Which statement best describes the equation [tex]$CaCO _3+2 HCl \rightarrow CaCl _2+ CO _2+ H _2 O$[/tex]?

A. [tex]$CaCO _3$[/tex] is a reactant; it is present before the reaction occurs.
B. [tex]$CaCl _2$[/tex] is a reactant; it is present before the reaction occurs.
C. [tex]$CO _2$[/tex] is a reactant because it is most likely a gas.
D. [tex]$H _2 O$[/tex] is a reactant because it is most likely a liquid.

Sagot :

GinnyAnswer
To determine which statement best describes the equation [tex]\( CaCO_3 + 2HCl \rightarrow CaCl_2 + CO_2 + H_2O \)[/tex], we should analyze the components of the chemical reaction step-by-step.

### Step-by-Step Analysis:

1. Identify the reactants and products:
- Reactants: These are the substances present before the reaction occurs. They are found on the left side of the chemical equation. In this equation, the reactants are [tex]\( CaCO_3 \)[/tex] (calcium carbonate) and [tex]\( HCl \)[/tex] (hydrochloric acid).
- Products: These are the substances formed as a result of the reaction. They are found on the right side of the chemical equation. In this equation, the products are [tex]\( CaCl_2 \)[/tex] (calcium chloride), [tex]\( CO_2 \)[/tex] (carbon dioxide), and [tex]\( H_2O \)[/tex] (water).

2. Match statements with identified reactants and products:
- Statement 1: [tex]\( CaCO_3 \)[/tex] is a reactant; it is present before the reaction occurs.
- This statement correctly identifies [tex]\( CaCO_3 \)[/tex] as a reactant, which we found on the left side of the equation.
- Statement 2: [tex]\( CaCl_2 \)[/tex] is a reactant; it is present before the reaction occurs.
- This is incorrect because [tex]\( CaCl_2 \)[/tex] is a product found on the right side of the equation.
- Statement 3: [tex]\( CO_2 \)[/tex] is a reactant because it is most likely a gas.
- This is incorrect because [tex]\( CO_2 \)[/tex] is a product, even though it is indeed most likely a gas. Being a gas does not necessarily mean it is a reactant.
- Statement 4: [tex]\( H_2O \)[/tex] is a reactant because it is most likely a liquid.
- This is incorrect because [tex]\( H_2O \)[/tex] is a product, even though it is most likely a liquid. Being a liquid does not necessarily mean it is a reactant.

Given the analysis:
- Statement 1 is correct as it accurately describes [tex]\( CaCO_3 \)[/tex] as a reactant present before the reaction occurs.

Therefore, the best statement that describes the equation [tex]\( CaCO_3 + 2HCl \rightarrow CaCl_2 + CO_2 + H_2O \)[/tex] is:
[tex]\[ \boxed{1} \][/tex]
[tex]\[ \text{"CaCO}_3 \text{ is a reactant; it is present before the reaction occurs."} \][/tex]
Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. We appreciate your time. Please revisit us for more reliable answers to any questions you may have. We're glad you chose Westonci.ca. Revisit us for updated answers from our knowledgeable team.