Unit 4 - Topic 5

Question 1

Electrochemical cell

Answer 1

Device containing cathode, anode, and electrolyte

Question 2

Electrodes

Answer 2

Two metals in a voltaic or electrochemical cell

Question 3

Anode vs cathode

Answer 3

Negative vs positive electrode

Question 4

Dif between wet and dry cells

Answer 4

Wet cells use liquid electrolyte

Dry cells us paste, plastic, or ceramic solid electrolyte

Question 5

Cad batteries use

Answer 5

Wet cells

Lead acid

Question 6

Process occurring in electrochemical cells

Answer 6

One electrode consumes as cell operates

Question 7

In depth what happens in electrochemical cell

Answer 7

Cell supplies current to circuit
Atoms of anode become ions and go into electrolyte solution
Anode strip disintergrates

Question 8

Common dry cells leak cause

Answer 8

Zinc case(electrode) eaten away and paste oozes out

Question 9

Chemical reaction in cell determine

Answer 9

Voltage cell can create

Question 10

Most cells produce … but most cannot surpass …

Answer 10

1.5 V

2 V

Question 11

To obtain higher voltages

Answer 11

Cells connected in series

Question 12

Primary and secondary cell dif

Answer 12

Primary - non-rechargeable

Secondary - rechargeable

Question 13

Primary cell def

Answer 13

Amount of chemicals in cell determines total amount of electricity cell can produce

Question 14

Secondary cell def

Answer 14

Chemical reactions are reversible

Question 15

D and AA cell example

Answer 15

D cell contains more chemicals than AA

D cell longer working life than AA in identical circuit

Question 16

In a recharger

Answer 16

Electricity forced through “dead” cell rebuilding og chemicals
Cell can be reused

Question 17

Types of cells

Answer 17

Zinc carbon cell
Alkaline cell
Zinc-air cell
Lead acid cell
Nickel-cadmium cell
Nickel-metal hydride

Question 18

Primary cells

Answer 18

Zinc carbon
Alkaline
Zinc-air

Question 19

Secondary cells

Answer 19

Lead acid
Nickel-cadmium
Nickel-metal hydride

Question 20

Dry cells

Answer 20

Zinc carbon cell
Alkaline cell
Zinc-air cell
Nickel-cadmium cell
Nickel-metal hydride

Question 21

Wet cells

Answer 21

Lead acid cell

Question 22

Cells w/ potassium hydroxide as electrolyte

Answer 22

Zinc-air
Alkaline
Nickel-cadmium
Nickel-metal hydride

Question 23

Electrolyte in zinc carbon

Answer 23

Flour, starch, ammonium chloride

Question 24

Electrolyte in lead acid

Answer 24

Sulfuric acid

Question 25

Used in portable handheld devices

Answer 25

``` Zinc carbon cell Alkaline cell Zinc-air cell Nickel-cadmium cell Nickel-metal hydride {dry cells} ```

Question 26

Used in vehicles

Answer 26

Lead acid | {wet cells}

Question 27

Fuel cell

Answer 27

Cells that combine hydrogen and oxygen without combustion to creat electricity

Question 28

Fuel cell pros

Answer 28

Zero emissions of harmful chemical Environmentally-friendly Heat, electricity, pure water only by-products of reaction 50-85% efficient u like regular 25-40% Work as long as long as proper fuel supplied

Question 29

Fuel cell cons

Answer 29

Expensive | Need efficient and non-polluting source of hydrogen fuel