Question 5 (10 points) How many moles of Cuci, are needed to react with 4 moles of Al? + 3CuCl2 (aq) → Cu (s) + 2AlCl3 (24) O a 6 moles 1 mole 2 moles OO 8 moles​

A. 6 moles

Explanation:

This question contains a chemical reaction between aluminum (Al) and Copper(II)Chloride to give copper and aluminum chloride. The unbalanced chemical equation is as follows:

Al (s) + 3CuCl2 (aq) → Cu (s) + 2AlCl3

To balance the equation, we use coefficients in front of Al and Cu to ensure the amount of both are uniform on both sides of the equation. The balanced equation is as follows;

2Al (s) + 3CuCl2 (aq) → 3Cu (s) + 2AlCl3

From the balanced equation, 2 moles of Al reacts with 3 moles of CuCl2

Hence, 4 moles of Al will react with (4 × 3) ÷ 2

= 12 ÷ 2

= 6 moles of CuCl2