Question

Imagine that A and B are cations and X, Y, and Z are anions, and that the following reactions occur:

AX(aq)+BY(aq)→no precipitate


AX(aq)+BZ(aq)→precipitate


Which of the following choices is insoluble?


AX

AY

AZ

BX

BY

BZ

I figured it out
It's AZ

Answer 1

Answer: AZ is the insoluble choice.

Step-by-step explanation:

Z is an anion of a weak electronegative element. Hence, it bounds lightly with the highly electropositive cation A to form AZ.

AZ is not as ionic as AX, AY, BX, BY and BZ, so it is insoluble in water and yields precipitate on reaction with the salt of a weaker metal.