Question

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

Explanation:

Step1: Analyze first reaction

The given reaction is $\text{FeCl}_3(aq) + \text{Fe}(s)
ightarrow \text{FeCl}_2(aq) + \text{Cl}_2(g)$. First, identify reactants (left of arrow) and products (right of arrow):
Reactants: $\text{FeCl}_3(aq)$ and $\text{Fe}(s)$
Products: $\text{FeCl}_2(aq)$ and $\text{Cl}_2(g)$
Now match to options:

• Option 1: $\text{FeCl}_3$ and $\text{FeO}$ are reactants → Incorrect (no $\text{FeO}$)
• Option 2: $\text{FeCl}_2$ and $\text{H}_2\text{O}$ are products → Incorrect (no $\text{H}_2\text{O}$)
• Option 3: $\text{FeCl}_2$ and $\text{Cl}_2$ are products → Correct
• Option 4: $\text{FeO}$ and $\text{HCl}$ are reactants → Incorrect (no such substances)

Step2: Analyze second reaction

The given reaction is $\text{Zn}(s) + \text{Pb(NO}_3\text{)}_2(aq)
ightarrow \text{Zn(NO}_3\text{)}_2(aq) + \text{Pb}(s)$. Translate to words:

• $\text{Zn}(s)$ = solid zinc
• $\text{Pb(NO}_3\text{)}_2(aq)$ = lead (II) nitrate dissolved in water
• $\text{Zn(NO}_3\text{)}_2(aq)$ = aqueous zinc nitrate
• $\text{Pb}(s)$ = solid lead

Now match to options:

• Option 1: Mentions nitrogen oxide → Incorrect (no such product)
• Option 2: Mentions lead nitrate (not nitrite) → Correct: Solid zinc and lead (II) nitrate, dissolved in water, react to form aqueous zinc nitrate and solid lead
• Option 3: Mentions lead nitrite → Incorrect
• Option 4: Mentions lead nitrite → Incorrect

Answer:

1. Correct option: $\boldsymbol{\text{FeCl}_2 \text{ and } \text{Cl}_2 \text{ are the products}}$
2. Correct option: $\boldsymbol{\text{Solid zinc and lead (II) nitrate, dissolved in water, react to form aqueous zinc nitrate and solid lead}}$