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Question 8.CC.6: Equations for Metals and Acids Write a balanced equation for......

Equations for Metals and Acids Write a balanced equation for the reaction of Al(s) with HCl(aq).

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Write the reactants and products. When a metal reacts with an acid, the products  are a salt and hydrogen gas.

\mathrm{Al}(s)\,+\,\mathrm{HCl}(a q)\,\longrightarrow\,\mathrm{salt}\,+\,\mathrm{H}_{2}(g)

Determine the formula of the salt. When Al(s) reacts, it forms  \mathrm{A}\mathrm{l}^{3+} , which is balanced by 3Cl¯ from HCl.

\mathrm{Al}(s)\,+\,\mathrm{HCl}(a q)\,\longrightarrow\,\mathrm{AlCl}_{3}(a q)\,+\,\mathrm{H}_{2}(g)

Balance the equation.

2\mathrm{Al}(s)\,+\,6\mathrm{HCl}(a q)\,\longrightarrow\,2\mathrm{AlCl}_{3}(a q)\,+\,3\mathrm{H}_{2}(g)

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