Question

1.Rank the lead halide salts in order of their solubility in water?
2.Which is more soluble in water, NaIO3 or CSIO3?
3. Rank the group 2 Carbonates in order of thermal stability ?

Answer 1

Answer on Question #76761 – Chemistry – General Chemistry

You gets TWO isolates. $\mathrm{NaSO_4}$, and $\mathrm{CdO_2}$, . I suspect that the caesium salt would be more insoluble. Because, the caesium cation is larger than the sodium one, and thus there is probably a better size match between the caesium and iodate ion-pair, and thus decreased solubility.

For the least halide series:

$\mathrm{K_{ac}:PNC(21.70 + 10^{-3})}$

$\mathrm{PHBr_2(6.60 + 10^{-4})};\mathrm{PH_2(0.80 + 10^{-4})}$ the which gives.

$\mathrm{PNCI_2}$ is $\mathrm{PHBr_2 = PHI_2}$

order of decreasing solubility:

Size matching between anion, and cation, probably again plays a part here.

As for the alkaline earth carbonates, you are probably going to have to consult your test. A size mismatch again probably lowers the temperature of decomposition, but you need data to argue your position.

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