Zn + AgNO3 -> 吾該幫下我呀

Displacement occurs. Zinc is oxidized to zinc ions, and silver ions in the solution are reduced to silver which is deposited on the surface of zinc.
Zn(s) + 2AgNO3(aq) → Zn(NO3)2(aq) + 2Ag(s)
OR: Zn(s) + 2Ag^+(aq) → Zn^2+(aq) + 2Ag(s)

Observation:
Zinc dissolves. A silvery metal is deposited.

Zn + AgNO3 -> Zn(NO3)2 + Ag

This is a displacement reaction.

Explanation: Since Zn is more reactive than Ag, so Zn can displace Ag from AgNO3.

Observation: Zn dissolves(因為Zn 變左Zn(NO3)2, Zn(NO3)2係soluble).

Q:仲有我想問Ag係Zn到會係變左咩野colour:
A: 我唔係好明你想問咩, 咁我就將所有野既colour 話比你知...

Zn:silver
AgNO3:colourless
Zn(NO3)2:colourless
Ag:silver

2010-08-19 09:13:51 補充：
唔好意思, 個reaction 寫未balance, 應該係:
Zn + 2AgNO3 -> Zn(NO3)2 + 2Ag