Solubility rules

Question 1

Group 1 metals and (NH4)+

Answer 1

Soluble compounds

Question 2

Nitrates ((NO3)-)

Answer 2

Soluble compounds

Question 3

Acetates (CH3COO-)

Answer 3

Soluble compounds

Question 4

Chlorides (Cl), Bromides (Br-) and Iodides (I-)

Answer 4

Soluble compounds except for Ag +, (Pb)2+, Hg+

Question 5

Sulfates ((SO4)2-)

Answer 5

Soluble compounds except for Ag+, (Pb)2+, Hg+, (Ba)2+, (Sr)2+ and (Ca)2+

Question 6

Carbonates ((CO3)2-), sulfites ((SO2)2-) and phosphates ((PO4)3-)

Answer 6

Insoluble compounds except Group 1 metals and (NH4)+

Question 7

Hydroxides (OH-)

Answer 7

Insoluble compounds, except for Group 1 metals, (NH4)+, (Ca)2+ and (Ba)2+

Question 8

Sulfides (S2-)

Answer 8

Insoluble except for Group 1 and 2 metals and (NH4)+

Question 9

Oxides (O)2-)

Answer 9

Insoluble except for Group 1 metals, (NH4)+,, Ca(2+) and Ba(2+)

Question 10

All the metals in group _(a)__ are soluble. What are the names of these metals? (b)
Why are they soluble? (c)

Answer 10

(a) 1
(b) alkali metals
(c) Gr 1 metals form simple salts that are soluble because alkali metals do not have a high charge. Salts are held together through the attraction of opposite charges. Salts with ions of low charges are held less strongly together and can dissolve in water. more readily than salts held together by high/ strong charges.