Formulae, equations and hazards

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Question 30
Easy

When solid barium carbonate is added to dilute hydrochloric acid, a reaction occurs forming barium chloride, water, and carbon dioxide gas:

BaCO3(?)+2HCl(?)→BaCl2(?)+H2O(l)+CO2(?) \text{BaCO}_3(\text{?}) + 2\text{HCl}(\text{?}) \rightarrow \text{BaCl}_2(\text{?}) + \text{H}_2\text{O}(\text{l}) + \text{CO}_2(\text{?}) BaCO3​(?)+2HCl(?)→BaCl2​(?)+H2​O(l)+CO2​(?)

Which of the following shows the correct state symbols to replace the question marks in the equation?

BaCO3(s)\text{BaCO}_3(\text{s})BaCO3​(s), HCl(l)\text{HCl}(\text{l})HCl(l), BaCl2(s)\text{BaCl}_2(\text{s})BaCl2​(s), CO2(g)\text{CO}_2(\text{g})CO2​(g)

BaCO3(s)\text{BaCO}_3(\text{s})BaCO3​(s), HCl(aq)\text{HCl}(\text{aq})HCl(aq), BaCl2(aq)\text{BaCl}_2(\text{aq})BaCl2​(aq), CO2(g)\text{CO}_2(\text{g})CO2​(g)

BaCO3(aq)\text{BaCO}_3(\text{aq})BaCO3​(aq), HCl(aq)\text{HCl}(\text{aq})HCl(aq), BaCl2(s)\text{BaCl}_2(\text{s})BaCl2​(s), CO2(aq)\text{CO}_2(\text{aq})CO2​(aq)

BaCO3(s)\text{BaCO}_3(\text{s})BaCO3​(s), HCl(aq)\text{HCl}(\text{aq})HCl(aq), BaCl2(s)\text{BaCl}_2(\text{s})BaCl2​(s), CO2(g)\text{CO}_2(\text{g})CO2​(g)

Formulae, equations and hazards Questions

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