Question

making predictions about reactions
complete the following equations (note that the equations are not balanced) use the activity series if necessary.
li > k > ba > sr > ca > na > mg > al > mn > zn > cr > fe > cd >
co > ni > sn > pb > h > sb > bi > cu > ag > pd > hg > pt > au

1. $al + agcl \to ?$

$alcl_3 + ag$
$alag_3 + cl_2$
no reaction
$alcl + cl$

1. $mg + ca(oh)_2 \to ?$

$mg(oh)_2 + ca$
no reaction
$mgh_2 + cao$
$mgca + h_2o$

Explanation:

Step1: Compare metal reactivity (Al vs Ag)

From activity series: $\text{Al} > \text{Ag}$, so Al displaces Ag.

Step2: Write correct single displacement product

$\text{Al} + \text{AgCl}
ightarrow \text{AlCl}_3 + \text{Ag}$ (matches given correct option)

Step3: Compare metal reactivity (Mg vs Ca)

From activity series: $\text{Ca} > \text{Mg}$, so Mg cannot displace Ca.

Step4: Determine reaction outcome

No single displacement reaction occurs.

Answer:

For $\text{Al} + \text{AgCl}
ightarrow$: $\text{AlCl}_3 + \text{Ag}$
For $\text{Mg} + \text{Ca(OH)}_2
ightarrow$: no reaction