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Question 10.10: 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 hydrogen gas and a salt. The unbalanced equation is written as

Al(s)+HCl(aq) \longrightarrow H_{2}(g)+\text {salt}(aq)

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

Al(s)+HCl(aq) \longrightarrow H_{2}(g)+AlCl_{3}(aq)

Balance the equation.

2 Al(s)+6 HCl(aq) \longrightarrow 3 H_{2}(g)+2 AlCl_{3}(a q)

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