Use the chemical reaction to answer the question.
NaHCO3 + HC2H3O2 -- NaC2H3O2 + H2O + CO2
A student mixes baking soda and acetic acid to produce a chemical reaction shown. Which statement about the reaction is correct?
1. Some atoms gain mass after the reaction
2. There are more H atoms after the reaction.
3. Atoms of Na are destroyed during reaction
4. The atoms of ractants are regrouped during the reaction
2. There are more H atoms after the reaction.
The correct statement about the reaction is:
4. The atoms of reactants are regrouped during the reaction.
In this chemical reaction, the reactants (sodium bicarbonate and acetic acid) combine to form different products (sodium acetate, water, and carbon dioxide). The atoms from the reactants are rearranged to form the products, but no atoms are destroyed or gained mass in the process.
To determine the correct statement about the given chemical reaction, let's analyze the reaction equation:
NaHCO3 + HC2H3O2 -- NaC2H3O2 + H2O + CO2
1. The statement "Some atoms gain mass after the reaction" cannot be determined from the reaction equation alone. Mass is conserved in chemical reactions, meaning the total mass of the reactants equals the total mass of the products.
2. The statement "There are more H atoms after the reaction" is incorrect. Counting the number of hydrogen (H) atoms on each side of the equation, we have one H atom in both HC2H3O2 and H2O as reactants, and two H atoms in NaC2H3O2 as a product. Therefore, the number of H atoms remains the same before and after the reaction.
3. The statement "Atoms of Na are destroyed during the reaction" is incorrect. Na (sodium) atoms are present in both the reactant NaHCO3 and the product NaC2H3O2. Therefore, no Na atoms are destroyed during the reaction.
4. The statement "The atoms of reactants are regrouped during the reaction" is correct. In the given reaction, the atoms of the reactants (NaHCO3 and HC2H3O2) are rearranged and form the product molecules (NaC2H3O2, H2O, and CO2). This rearrangement is a characteristic of a chemical reaction.
Based on the analysis, the correct statement is: "The atoms of reactants are regrouped during the reaction" (option 4).