Electrocells

Question 1

What occurs at the most reactive metal in electro cells

Answer 1

Oxidation reactions

Question 2

What occurs at the least reactive metal in the electro cell

Answer 2

Reduction reactions

Question 3

What is the Daniel cell

Answer 3

2 different metals inn salt solutions that are connected causing a current to flow from most to least reactive metal

Question 4

Why does electric current flow from most to least reactive in the Daniel cell

Answer 4

Since the most reactive is oxidised and least reactive is reduced

Question 5

What was the two chemicals in the first Daniel cell

Answer 5

Zinc and copper

Question 6

What is a reactive metal

Answer 6

Lose its electrons easily

Question 7

How do atoms lose their electrons easily

Answer 7

From having less subatomic particles

Question 8

Where is the more negative electrode potential

Answer 8

At the more reactive metal

Question 9

Where is the more positive electrode potential

Answer 9

At the least reactive metal

Question 10

What occurs if a voltmeter is added

Answer 10

It can measure potential difference

Question 11

What occurs if a high resistance voltmeter is connected

Answer 11

Can measure the EMF

Question 12

What is EMF

Answer 12

Electromotive force

Question 13

What is electrode potential

Answer 13

How easily electrons are released by an electrode

Question 14

How do they calculate the right take away left values

Answer 14

Since they compare with hydrogen due to its value being zero

Question 15

Conditions for the hydrogen comparisons in electro cells

Answer 15

1 moldm3
1 atm
298k heat.
PLATINUM WIRE

Question 16

How do you draw the Daniel cell

Answer 16

Most reactive, ion // bridge// ion, least reactive

Question 17

Why is a platinum wire used for hydrogen

Answer 17

Since it is unreactive

Question 18

What is the explanation for reducing ions but they cannot be reduced any further

Answer 18

The reducing agent is more negative than what is reduced but is more positive to the next reduction state

Question 19

What type of reaction do rechargeable cells use

Answer 19

Reversible reactions

Question 20

How does recharging batteries work

Answer 20

The current is reapplied moving the electrons in the opposite direction