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Chemical equations - exercises
\[\require{mhchem}\]
Exercises
Identify the reactants and products in the following chemical equations.
\(\ce{2H}_{2}+\ce{O}_{2}\rightarrow2\ce{H}_{2}\ce{O}\)
Reactants - \(\ce{H}_{2}\) and \(\ce{O}_{2}\)
Products - \(\ce{H}_{2}\ce{O}\)
\(\ce{CH}_{4}+2\ce{O}_{2}\rightarrow\ce{CO}_{2}+\ce{H}_{2}\ce{O}\)
Reactants - \(\ce{CH}_{4}\) and \(\ce{O}_{2}\)
Products - \(\ce{CO}_{2}\) and \(\ce{H}_{2}\ce{O}\)
\(2\ce{Fe}_{2}\ce{O}_{3}+3\ce{C}\rightarrow4\ce{Fe}+3\ce{CO}_{2}\)
Reactants - \(\ce{Fe}_{2}\ce{O}_{3}\) and \(\ce{C}\)
Products - \(\ce{Fe}\) and \(\ce{CO}_{2}\)
\(\left(\ce{NH}_{4}\right)_{2}\ce{Cr}_{2}\ce{O}_{7}\rightarrow\ce{Cr}_{2}\ce{O}_{3}+4\ce{H}_{2}\ce{O}+\ce{N}_{2}\)
Reactants - \(\left(\ce{NH}_{4}\right)_{2}\ce{Cr}_{2}\ce{O}_{7}\)
Products - \(\ce{Cr}_{2}\ce{O}_{3}\) , \(\ce{H}_{2}\ce{O}\) and \(\ce{N}_{2}\)
\(\ce{CaCO}_{3}\rightarrow\ce{CaO}+\ce{CO}_{2}\)
Reactants - \(\ce{CaCO}_{3}\)
Products - \(\ce{CaO}\) and \(\ce{CO}_{2}\)
Write and balance the following chemical equations.
Ammonia gas reacts with oxygen gas to produce nitrogen gas and water.
\(4\ce{NH}_{3}+3\ce{O}_{2}\rightarrow2\ce{N}_{2}+6\ce{H}_{2}\ce{O}\)
Sodium sulphate reacts with element carbon to produce sodium sulphite and carbon dioxide gas.
\(\ce{Na}_{2}\ce{SO}_{4}+2\ce{C}\rightarrow\ce{Na}_{2}\ce{S}+2\ce{CO}_{2}\)
Element iron reacts with oxygen gas to produce ferric oxide.
\(4\ce{Fe}+3\ce{O}_{2}\rightarrow2\ce{Fe}_{2}\ce{O}_{3}\)
Ammonium chloride separates into ammonia and hydrogen chloride
\(\ce{NH}_{4}\ce{Cl}\rightarrow\ce{NH}_{3}+\ce{HCl}\)
Hydrogen iodide decomposes into iodine gas and hydrogen gas.
\(2\ce{HI}\rightarrow\ce{H}_{2}+\ce{I}_{2}\)
Balance the following chemical equations
\(\ce{FeI}_{2}+\ce{Cl}_{2}\rightarrow\ce{FeCl}_{3}+\ce{I}_{2}\)
\(2\ce{FeI}_{2}+3\ce{Cl}_{2}\rightarrow2\ce{FeCl}_{3}+2\ce{I}_{2}\)
\(\ce{Fe}_{2}\ce{O}_{3}+\ce{C \rightarrow}\ce{Fe}+\ce{CO}_{2}\)
\(2\ce{Fe}_{2}\ce{O}_{3}+3\ce{C}\rightarrow4\ce{Fe}+3\ce{CO}_{2}\)
\(\ce{HNO}_{3}+\ce{H}_{2}\ce{S \rightarrow}\ce{NO}+\ce{S}+\ce{H}_{2}\ce{O}\)
\(2\ce{HNO}_{3}+3\ce{H}_{2}\ce{S}\rightarrow2\ce{NO}+3\ce{S}+4\ce{H}_{2}\ce{O}\)
\(\ce{SO}_{2}+\ce{H}_{2}\ce{O}\rightarrow\ce{H}_{2}\ce{SO}_{3}\)
\(\ce{SO}_{2}+\ce{H}_{2}\ce{O}\rightarrow\ce{H}_{2}\ce{SO}_{3}\)
\(\ce{AgNO}_{3}+\ce{KCl}\rightarrow\ce{KNO}_{3}+\ce{AgCl}\)
\(\ce{AgNO}_{3}+\ce{KCl}\rightarrow\ce{KNO}_{3}+\ce{AgCl}\)
\(\ce{PCl}_{3}+\ce{H}_{2}\rightarrow\ce{PH}_{3}+\ce{HCl}\)
\(\ce{PCl}_{3}+3\ce{H}_{2}\rightarrow\ce{PH}_{3}+3\ce{HCl}\)
\(\ce{PbO}+\ce{NH}_{3}\rightarrow\ce{Pb}+\ce{N}_{2}+\ce{H}_{2}\ce{O}\)
\(3\ce{PbO}+2\ce{NH}_{3}\rightarrow3\ce{Pb}+\ce{N}_{2}+3\ce{H}_{2}\ce{O}\)
\(\ce{NaClO}_{3}\rightarrow\ce{NaCl}+\ce{O}_{2}\)
\(2\ce{NaClO}_{3}\rightarrow2\ce{NaCl}+3\ce{O}_{2}\)
\(\ce{N}_{2}\ce{O}\rightarrow\ce{N}_{2}+\ce{O}_{2}\)
\(2\ce{N}_{2}\ce{O}\rightarrow2\ce{N}_{2}+\ce{O}_{2}\)
\(\ce{NH}_{4}\ce{NO}_{3}\rightarrow\) \(\ce{N}_{2}+\ce{O}_{2}+\ce{H}_{2}\ce{O}\)
\(2\ce{NH}_{4}\ce{NO}_{3}\rightarrow2\ce{N}_{2}+\ce{O}_{2}+4\ce{H}_{2}\ce{O}\)
\(\ce{Mn}_{2}\left(\ce{CO}_{3}\right)_{3}\rightarrow\) \(\ce{Mn}_{2}\ce{O}_{3}+\ce{CO}_{2}\)
\(\ce{Mn}_{2}\left(\ce{CO}_{3}\right)_{3}\rightarrow\ce{Mn}_{2}\ce{O}_{3}+3\ce{CO}_{2}\)
\(\ce{Na2CO3 +Mg(NO3)2\rightarrow MgCO3 +NaNO3}\)
\(\ce{Na2CO3 +Mg(NO3)2\rightarrow MgCO3 +2NaNO3}\)