4 Use your solubility table to predict whether the following

4. Use your solubility table to predict whether the following compounds will be soluble in water at 25°C: (5 points) CompoundSoluble/Insoluble CaSO4 K2SO4 Ba(OH)2 BeS CuCl2 Solubleinsolüble Compound Mg(NO3)2 CaCl2 Al2S3 (NH4)3PO4 SrCO3

Solution

First see the rules of solubility: 1)Rule for phosphates says all phosphates are insoluble except for the alkali metals and NH4+.

2)   Rule for nitrates: All nitrates are soluble.

3) Rule for sulfides: All sulfides are insoluble except those of the alkali metals, alkali earths, and NH4+.

4) Rule for Chlorides: All chlorides are soluble except AgCl, Hg2Cl2, and PbCl2

Mg(NO3) Soluble in water

CaCl2 Soluble in water

Al2S3: Aluminum sulfide actually reacts with water to form aluminum hydroxide and hydrogen sulfide gas.Thus it decomposes in water instead of dissolving.

(NH4)3PO4:  Soluble in water

SrCO3: not soluble in water. t dissolves in water

caso4 : yes Soluble in water

K2SO4 :yes Soluble in water

Ba(OH)2 :  yes Soluble in water

BeS: yes Soluble in water

CuCl2: yes Soluble in water