Question

42. Balance the equation below. What is the coefficient for HCI?
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Answer 1

Answer:

• Mg + 2HCl ⇒ MgCl₂ + H₂
• Coefficient of HCl = 2

Explanation:

Equation (given) :

• Mg + HCl ⇒ MgCl₂ + H₂

Compare the LHS and RHS :

• On the left side, there are only single atoms of H and Cl, whereas there are 2 of each on the right side
• As HCl is a single compound on the left, multiply HCl into 2 to balance the reaction
• Coefficient of HCl = 2

Balanced Equation :

• Mg + 2HCl ⇒ MgCl₂ + H₂