Zn2+ and al3+ are amphoteric. demonstrate
howal(oh)3(s) and zn(oh)2(s) react in
anamphoteric manner (show balanced chemical equations),

write balanced chemical reactions for the following:
a. nh3 was added to cu2+ and
tofe3+ and water.
b. nh3 was added to zn2+ and
toal3+ and water.

Explanation:

1) Amphoteric substances can react both like an acid or a base depending if they are in presence of a base or an acid.

Zinc hydroxide (Zn(OH)2):

In acid:

In base:

Aluminium hydroxide (Al(OH)3)

In acid:

In base:

2) Reactions

a)

b)

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante