Question

exit ticket: double replacement rxns
1 multiple answer 1 point
select the two products of the double replacement reaction below?
potassium carbonate(aq) + strontium nitrate(aq) -->??? +???
potassium carbonate(s)
strontium nitride(aq)
strontium carbonate(s)
potassium nitrate(aq)

Explanation:

Step1: Write the chemical formula

Potassium carbonate: \(K_2CO_3\), strontium nitrate: \(Sr(NO_3)_2\).

Step2: Double - replacement reaction principle

In a double - replacement reaction \(AB + CD
ightarrow AD+CB\). Here \(A = K^+\), \(B=CO_3^{2 -}\), \(C = Sr^{2+}\), \(D = NO_3^-\).
The reaction is \(K_2CO_3(aq)+Sr(NO_3)_2(aq)
ightarrow 2KNO_3(aq)+SrCO_3(s)\) according to the solubility rules (\(SrCO_3\) is insoluble and \(KNO_3\) is soluble in water).

Answer:

C. strontium carbonate(s), D. potassium nitrate(aq)