Question

1. drag and drop the equations with the descriptions.

2al(s) + 3cucl₂(aq) → 2alcl₃(aq) + 3cu(s)
2li(s) + 2h₂o(l) → 2lioh(aq) + h₂(g)
mg(s) + hcl(aq) → mgcl₂(aq) + h₂(g)
2nai(aq) + cl₂(g) → 2nacl(aq) + i₂(g)

1. balance the single replacement reaction by typing the numbers in the blanks. type in 1 if the coefficient is 1.

mg + al(oh)₃ → mg(oh)₂ + al

1. balance the single replacement reaction by typing the numbers in the blanks. type in 1 if the coefficient is 1.

fe + nii₃ → fei₃ + ni
choices
ii the replacement of a metal cation by another metal
ii the replacement of hydrogen in water by a metal
ii the replacement of hydrogen in an acid by a metal
ii the replacement of a halogen by another halogen

Explanation:

Step1: Match equation to description 1

1. $2\text{Al}(s) + 3\text{CuCl}_2(aq)

ightarrow 2\text{AlCl}_3(aq) + 3\text{Cu}(g)$ matches the replacement of a metal cation by another metal (Al replaces Cu²⁺).

Step2: Match equation to description 2

1. $2\text{Li}(s) + 2\text{H}_2\text{O}(l)

ightarrow 2\text{LiOH}(aq) + \text{H}_2(g)$ matches the replacement of hydrogen in water by a metal (Li replaces H in H₂O).

Step3: Match equation to description 3

1. $\text{Mg}(s) + \text{HCl}(aq)

ightarrow \text{MgCl}_2(aq) + \text{H}_2(g)$ matches the replacement of hydrogen in an acid by a metal (Mg replaces H in HCl).

Step4: Match equation to description 4

1. $2\text{NaI}(aq) + \text{Cl}_2(g)

ightarrow 2\text{NaCl}(aq) + \text{I}_2(g)$ matches the replacement of a halogen by another halogen (Cl replaces I⁻).

Step5: Balance reaction 5

Balance Mg, Al, and hydroxide ions:
$3\text{Mg} + 2\text{Al(OH)}_3
ightarrow 3\text{Mg(OH)}_2 + 2\text{Al}$

Step6: Balance reaction 6

Balance Fe, Ni, and iodine ions:
$2\text{Fe} + 3\text{NiI}_2
ightarrow 2\text{FeI}_3 + 3\text{Ni}$

Answer:

Drag-and-Drop Matches:

1. $2\text{Al}(s) + 3\text{CuCl}_2(aq)

ightarrow 2\text{AlCl}_3(aq) + 3\text{Cu}(g)$ → the replacement of a metal cation by another metal

1. $2\text{Li}(s) + 2\text{H}_2\text{O}(l)

ightarrow 2\text{LiOH}(aq) + \text{H}_2(g)$ → the replacement of hydrogen in water by a metal

1. $\text{Mg}(s) + \text{HCl}(aq)

ightarrow \text{MgCl}_2(aq) + \text{H}_2(g)$ → the replacement of hydrogen in an acid by a metal

1. $2\text{NaI}(aq) + \text{Cl}_2(g)

ightarrow 2\text{NaCl}(aq) + \text{I}_2(g)$ → the replacement of a halogen by another halogen

Balanced Reactions:

1. $3\text{Mg} + 2\text{Al(OH)}_3

ightarrow 3\text{Mg(OH)}_2 + 2\text{Al}$

1. $2\text{Fe} + 3\text{NiI}_2

ightarrow 2\text{FeI}_3 + 3\text{Ni}$