To identify a reactant in the solid state for the given chemical reaction:
[tex]\[ \text{BaCO}_3 (\text{s}) + \text{HNO}_3 (\text{l}) \rightarrow \text{Ba}(\text{NO}_3)_2 (\text{aq}) + \text{CO}_2 (\text{g}) + \text{H}_2\text{O} (\text{l}) \][/tex]
Let's analyze each compound:
1. BaCO3 (Barium carbonate)
- The notation [tex]\((\text{s})\)[/tex] indicates that BaCO3 is in the solid state.
2. HNO3 (Nitric acid)
- The notation [tex]\((\text{l})\)[/tex] indicates that HNO3 is in the liquid state.
3. Ba(NO3)2 (Barium nitrate)
- The notation [tex]\((\text{aq})\)[/tex] indicates that Ba(NO3)2 is in the aqueous state (dissolved in water).
4. CO2 (Carbon dioxide)
- The notation [tex]\((\text{g})\)[/tex] indicates that CO2 is in the gaseous state.
Among the reactants, BaCO3 is identified in the solid state ([tex]\((\text{s})\)[/tex]).
Thus, the most accurate statement identifying a reactant in the solid state is:
- BaCO_3