Question

Aqueous magnesium chloride and hydrogen gas are produced when solid magnesium reacts with aqueous hydrochloric acid (HCl). What is the equation for this reaction? Do not worry about balancing this equation. Mg(s) + HCl(aq) → MgCl(aq) + H(g) MgCl(aq) + H(g) → Mg(s) + HCl(aq) Mg(s) + HCl(aq) → MgCl2(aq) + H2(g) MgCl2(aq) + H2(g) → Mg(s) + HCl(aq) Mg(s) + HCl(aq) + H2(g) → MgCl(aq)

Answer 1

If these are your 5 choices, the correct answer is 3 on E.D.G.

1 Mg(s) + HCl(aq) → MgCl(aq) + H(g)

2  MgCl(aq) + H(g) → Mg(s) + HCl(aq)

3 Mg(s) + HCl(aq) → MgCl2(aq) + H2(g)

4 MgCl2(aq) + H2(g) → Mg(s) + HCl(aq)

5 Mg(s) + HCl(aq) + H2(g) → MgCl(aq)

Answer 2

Answer:

Mg(s) + HCl(aq) → MgCl2(aq) + H2(g)

Explanation:

In the given reaction the reactants are:

Magnesium : Mg

Hydrochloric acid: HCl

The products include:

Magnesium chloride : MgCl2

Hydrogen gas: H2

Thus the chemical reaction can be represented as:

$Mg(s) + HCl(aq)\rightarrow MgCl2(aq)+ H2(g)$

in order to balance it, multiply HCl by 2 to get:

$Mg(s) +2 HCl(aq)\rightarrow MgCl2(aq)+ H2(g)$