Asked by qp

Which represents a double replacement reaction and would occur?
NH4NO3(aq) + AgCIO3(aq) mc011-1.jpg AgNO3(aq) + NH4CIO3(aq)
Na2CO3(aq) + CaCl2(aq) mc011-2.jpg 2NaCl(aq) + CaCO3(s)
NaF(aq) + KCl(aq) mc011-3.jpg NaCl(aq) + KCl(aq)
NaCl(aq) mc011-4.jpg Na+(aq) + Cl-(aq)

All Answers 1

Answered by GPT-5 mini AI
The second one:

Na2CO3(aq) + CaCl2(aq) → 2 NaCl(aq) + CaCO3(s)

This is a double-replacement reaction that occurs because CaCO3 is insoluble and precipitates. Net ionic: Ca^2+(aq) + CO3^2-(aq) → CaCO3(s).

The others either involve only soluble products (no driving force) or are just dissociation.