Simple Cell & Chemical Cells

BatteryA device that stores chemical energy that is

later converted to electricitySome batteries may consists of 1 single

simple cell with 2 electrodes and an electrolyte.

When two different metal plates are dipped into an electrolytes, a flow of electron occurs from the more reactive metal to the less reactive metal. Electricity is produced.

Other batteries consist of two or more simple cells arranged in series to increase the voltage.

Simple Voltaic CellConsists of 2 different metals that are

immersed into an electrolyte

Simple Voltaic Cell componentaaa

Electrodes, 2 different metals

Simple Voltaic Cell componentaaa

•electrolyte,•Can be replaced by sodium chloride solution or dilute nitric acid

Simple Voltaic Cell componentaaa •To detect production of electric

current•Can be replaced by galvanometer, voltmeter or ammeter

Simple Voltaic Cell componentaaa

Chemical Energy --- Electrical Energy

•To detect production of electric current•Can be replaced by galvanometer, voltmeter or ammeter

Electrodes, 2 different metals

electrolyte,Can be replaced by sodium chloride solution or dilute nitric acid

Reactivity Series and cell voltagePotassiumSodiumCalciumMagnesiumAluminiumCarbonZinc IronTinLeadCopperMercurySilverGold

MagnesiumZincIronTinLeadCopperSilver

Reactivity d

ecre

ase

Positive electrode

Negative electrode

Higher Voltage

Lower Voltage

How Voltaic Cell works? http://www.youtube.com/watch?v=yZduvq1ewsU

http://www.youtube.com/watch?v=MYoj9N-qvX0&feature=related

Simple Voltaic Cells

Electrolytic cell

Chemical energy changed to electrical energy

Electrical energy changed to chemical energy

2 electrodes, 2 different metals

2 electrodes, same or different metals

Dry cellsProduces 1.5 VUsed in: radio, pockets calculators, torch, and electrical shavers

(+): easy to carry(-): cannot be recharged

Lead-acid accumulatorSupplies 12 V, consists of 6 lead-acid

cells connected in series Uses in : car battery(+): can be recharged(-): heavy electrolyte spills over easily

Alkaline battery1.5 VUsed in: watches, torch, radios,

electrical shavers and toys(+): long lasting(-): cannot be recharged more expensive

Silver oxide-zinc (Mercury cell)

Produces 1.2 VShaped like a buttonUsed in: watches, camera(+): long lasting(-): cannot be recharged

Nickel-Cadmium batteryCan be rechargedUsed in: mobile electrical devices such as mobile phones and drills

(+): can be recharged(-): Expensive

Simple Voltaic CellConsists of ______________metals that are

immersed into ______________

Type of chemical cell

Simple Explaination

Uses Rechargeable

Specialty

Dry cell 1.5 VMost commonly used

RadioTorch

X

Lead-acid accumulator

12 V Heavy,_________ spills over easily

_____ VSimilar to dry cell

RadioTorch

Long _______More expensive

1.2VShaped like a button

X Long Lasting

Nickel-cadmium battery

Operates on the same principle as accumulator but uses different material

____________DrillsEnergency light system

Type of chemical cell

Simple Explaination

Uses Rechargeable

Specialty

Dry cell •1.5 V•Most commonly used

•Radio•Torch

X Easy to carry

Lead-acid accumulator

12 V Car battery √ Heavy,Electrolyte spills over easily

Alkaline battery

1.5 VSimilar to dry cell

RadioTorch

X Long LastingMore expensive

Silver oxide or mercury (II) oxide battery

1.2VShaped like a button

WatchCameracalculator

X Long Lasting

Nickel-cadmium battery

Operates on the same principle as accumulator but uses different material

Mobile phonesDrillsEnergency light system

√ Expensive