Question

1. choose the best answer.

for their lab report, students must describe a chemical reaction in words.
which of these would represent the correct word equation for this equation?
zn(s) + pb(no₃)₂(aq) → zn(no₃)₂(aq) + pb(s)
solid zinc and lead (ii) nitrite, dissolved in water, react to form aqueous zinc nitrite and solid lead (ii).
solid zinc and lead nitrogen oxide, dissolved in water, react to form aqueous zinc nitrate and solid lead.
solid zinc and lead (ii) nitrate, dissolved in water, react to form aqueous zinc nitrate and solid lead.
solid zinc and lead nitrate, dissolved in water, react to form aqueous zinc nitrate and solid lead.

Explanation:

1. Analyze the reactants and products: The reactants are solid zinc ($\text{Zn}(s)$) and aqueous lead(II) nitrate ($\text{Pb(NO}_3\text{)}_2(aq)$), and the products are aqueous zinc nitrate ($\text{Zn(NO}_3\text{)}_2(aq)$) and solid lead ($\text{Pb}(s)$).
2. Check each option:

• First option: Incorrect, as the compound is lead(II) nitrate, not lead(II) nitrite.
• Second option: Incorrect, as $\text{Pb(NO}_3\text{)}_2$ is lead(II) nitrate, not lead nitrogen oxide.
• Third option: Correctly identifies the reactants (solid zinc and lead(II) nitrate, dissolved in water) and products (aqueous zinc nitrate and solid lead).
• Fourth option: Incorrect, as it does not specify the oxidation state (II) for lead in the reactant, which is important for accuracy in the word equation.

Answer:

C. Solid zinc and lead (II) nitrate, dissolved in water, react to form aqueous zinc nitrate and solid lead. (Note: Assuming the options are labeled as A, B, C, D with the third option being C as per the order. If the original options have different labels, adjust accordingly based on the third option's content.)