Question

making activity series predictions
think about it
use the activity series below to predict the products of each of the following reactions. do not worry about balancing the equations.
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
$zn_3(po_4)_2 + ca \to ?$
no reaction
$znca + po_4$
$ca_3(po_4)_2 + zn$

Explanation:

Step1: Compare metal reactivity

From the series: $\text{Ca} > \text{Zn}$, so Ca replaces Zn.

Step2: Predict single displacement products

Calcium combines with phosphate; zinc is displaced.

Answer:

Ca₃(PO₄)₂ + Zn