Question #a7896

1 Answer
Sep 22, 2016

Answer:

#"Mg"_ ((s)) + 2"HCl"_ ((aq)) -> "MgCl"_ (2(aq)) + "H"_ (2(g)) uarr#

Explanation:

Magnesium, #"Mg"#, will react with hydrochloric acid, #"HCl"#, to produce aqueous magnesium chloride, #"MgCl"_2#, and hydrogen gas, #"H"_2#, which bubbles out of solution.

Your word equation will be

magnesium + hydrochloric acid #-># magnesium chloride + hydrogen gas

The balanced chemical equation that describes this single replacement reaction looks like this

#"Mg"_ ((s)) + 2"HCl"_ ((aq)) -> "MgCl"_ (2(aq)) + "H"_ (2(g)) uarr#

Notice that the equation includes the states of the substances. A solid #(s)# magnesium strip is added to hydrochloric acid, an aqueous solution #(aq)#.

The reaction produces aqueous magnesium chloride and gaseous #(g)# hydrogen gas, which as you can see bubbles out of solution.

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