6.5 (a) Voltaic Cell and Danielle Cell Structure

Voltaic Cell Daniell Cell

CHEMICAL CELL

Structure of Voltaic Cell

Copper (Cu)Zinc (Zn)

Sulphuric Acid (H2SO4)

Structures of Daniell Cell

Using salt bridge Using porous pot

Production of Electricity from Voltaic Cell

Zinc Copper

Sulphuric acid

KNaCaMgAlZnFeSnPbHCuHgAgAu

KNaCaMgAlZnFeSnPbHCuHgAgAu

Har

der

to r

emov

e el

ectr

ons

Connector wire

At zinc electrode (anode) zinc release electron to form ion.

Zn (p) Zn2+(aq) + 2e-

the released electrons reassemble at zinc plat.

At copper electrode (cathode) the released electrons by zinc flows to copper’s

electrode by connector wire. H+ ions (from water) & Zn2+ moves to copper’s

electrode. H+ ions discharge because of its position is lower in

electrochemical series. 2H+(aq) + 2e- H2(g)

In connector wire electron flows from negative terminal positive

terminal continuously electrical current. electrons flows voltmeter indicator removes.

Overall equation

Zn(s) + 2H+ (aq) Zn 2+(aq) + H2(g)