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Hydrochloric acid, HCl, reacts with magnesium, Mg - OCR Gateway - GCSE Chemistry - Question 15 - 2023 - Paper 1

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Hydrochloric acid, HCl, reacts with magnesium, Mg. Magnesium chloride and hydrogen are made. What is the balanced symbol equation for this reaction? A 2HCl + Mg →... show full transcript

Worked Solution & Example Answer:Hydrochloric acid, HCl, reacts with magnesium, Mg - OCR Gateway - GCSE Chemistry - Question 15 - 2023 - Paper 1

Step 1

What is the balanced symbol equation for this reaction?

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Answer

To balance the chemical equation for the reaction between hydrochloric acid and magnesium, we start by writing the unbalanced equation:

extHCl+extMgMgCl+H ext{HCl} + ext{Mg} \rightarrow \text{MgCl} + \text{H}

Next, we need to account for the products formed: magnesium chloride (MgCl₂) and hydrogen gas (H₂). Since magnesium chloride consists of one magnesium and two chloride ions, we need to ensure that chlorine is balanced. Thus, the balanced equation becomes:

2HCl+MgMgCl2+H22 \text{HCl} + \text{Mg} \rightarrow \text{MgCl}_2 + \text{H}_2

Thus, the correct option is C.

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