Which equation has both a liquid and a gas as products?
[tex]2 HgO ( s ) \rightarrow 2 Hg ( l )+ O _2(g)[/tex]
[tex]2 Mg ( s )+ O _2(g) \rightarrow 2 MgO ( s )[/tex]
[tex]2 KClO _8(s) \rightarrow 2 KCl ( s )+3 O _2(g)[/tex]
[tex]Mg ( s )+2 HCl ( aq ) \rightarrow H _2(g)+ MgCl _2( aq )[/tex]
Answer (2)
Analyze each chemical equation to identify the physical states of the products.
Determine if the products include both a liquid and a gas.
The equation 2 H g O ( s ) → 2 H g ( l ) + O 2 ( g ) produces both liquid mercury and oxygen gas.
Therefore, the answer is 2 H g O ( s ) → 2 H g ( l ) + O 2 ( g ) .
Explanation
Analyze the Problem We are given four chemical equations and asked to identify the one that produces both a liquid and a gas as products. We need to examine each equation and determine the physical states of the products.
Examine Each Equation Let's analyze each equation:
2 H g O ( s ) → 2 H g ( l ) + O 2 ( g ) : This equation shows mercury oxide ( H g O ) decomposing into mercury ( H g ) in the liquid state and oxygen ( O 2 ) in the gaseous state. Thus, it has both a liquid and a gas as products.
2 M g ( s ) + O 2 ( g ) → 2 M g O ( s ) : This equation shows magnesium ( M g ) reacting with oxygen ( O 2 ) to form magnesium oxide ( M g O ), which is a solid. It does not have both a liquid and a gas as products.
2 K Cl O 8 ( s ) → 2 K Cl ( s ) + 3 O 2 ( g ) : This equation shows potassium perchlorate ( K Cl O 8 ) decomposing into potassium chloride ( K Cl ) in the solid state and oxygen ( O 2 ) in the gaseous state. It does not have both a liquid and a gas as products.
M g ( s ) + 2 H Cl ( a q ) → H 2 ( g ) + M g C l 2 ( a q ) : This equation shows magnesium ( M g ) reacting with hydrochloric acid ( H Cl ) to form hydrogen ( H 2 ) in the gaseous state and magnesium chloride ( M g C l 2 ) in the aqueous state. It does not have both a liquid and a gas as products.
Identify the Correct Equation Based on the analysis, the first equation, 2 H g O ( s ) → 2 H g ( l ) + O 2 ( g ) , is the only one that has both a liquid ( H g ) and a gas ( O 2 ) as products.
Final Answer Therefore, the equation that has both a liquid and a gas as products is: 2 H g O ( s ) → 2 H g ( l ) + O 2 ( g )
Examples
Understanding chemical reactions and their products is crucial in various fields. For instance, in environmental science, knowing the products of a reaction helps in assessing pollution levels. In manufacturing, it's essential for designing efficient processes. In the given problem, we identified a reaction that produces both liquid mercury and oxygen gas. Mercury is a toxic substance, so understanding this reaction is important for handling mercury-containing compounds safely.
The equation that has both a liquid and a gas as products is 2 HgO ( s ) → 2 Hg ( l ) + O 2 ( g ) . This equation produces liquid mercury and oxygen gas. None of the other equations meet this criterion.
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