Question

making activity series predictions
use the activity series below to predict the products of each of the following reactions. you do not need to balance 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
$ce{na_{2}co_{3} + k -> ?}$
no reaction
$ce{k_{2}co_{3} + na}$
$ce{nak + co_{3}}$

Explanation:

Step1: Compare metal reactivity

From the activity series: $\text{K} > \text{Na}$

Step2: Predict single displacement

More reactive K replaces Na in $\text{Na}_2\text{CO}_3$.

Answer:

B. $\text{K}_2\text{CO}_3 + \text{Na}$