Question

HCI + Mg(OH)₂---> MgCl₂+ H₂O

Balance the equation above. Which of the following describes the number of moles of each product that are formed by this chemical reaction after it has been balance?

A. One mole magnesium chloride, one mole water
B. One mole magnesium chloride, two moles water
C. Two moles magnesium chloride, one mole water
D. Two moles magnesium chloride, two moles water"

Answer 1

The balanced chemical equation is Mg(OH)2 + 2HCl → MgCl2 + 2H2O, and for each mole of Mg(OH)2 and HCl reacted, one mole of magnesium chloride and two moles of water are produced, respectively.

Step-by-step explanation:

The question asks us to balance the chemical equation HCl + Mg(OH)₂ --> MgCl₂ + H₂O and identify the number of moles produced of each product. To balance the equation, determine the number of atoms of each element in the reactants and products and make sure they are equal on both sides. The balanced reaction is:

Mg(OH)₂ (s) + 2HCl(aq) → MgCl₂ (aq) + 2H₂O(l)

Thus, for each mole of Mg(OH)₂ that reacts with 2 moles of HCl, one mole of MgCl₂ and two moles of H₂O are produced. Therefore, the correct answer to the student's question is B. One mole magnesium chloride, two moles water.