Chemistry

Question 1

At the anode the mass of the metal …. and the concentration of the ion ….

Answer 1

At the anode the mass of the metal decreases and the concentration of the ion increses

Question 2

At the cathode the mass of the metal… and the concentration of the ion…

Answer 2

At the cathode the mass of the metal increases and the concentration of the ion decreases

Question 3

Indicate the role of the salt bridge (at the anode) (we say m and concentration bel sou2al)

Answer 3

-ve ions migrate from the salt bridge towards the anode to compensate the excess of the positive charge.

Question 4

Indicate the role of the salt bridge (at the cathode) (we say m and concentration bel sou2al)

Answer 4

+ve ions will migrat3 from the salt bridge towards the cathode to compensate the deficiency of the positive charge

Question 5

Overall equation
? Anode ? Cathode=>

Answer 5

Metal (anode), ion(cathode)

Question 6

Lower E⁰ represents

Answer 6

Anode

Question 7

The SHE is? And the E ⁰ of this SHE is?

Answer 7

H±/H²/Pt
E⁰=0

Question 8

Role of salt bridge

Answer 8

1- It closes the circuit
2- It maintains the electroneutrality of the solutions

Question 9

EMF=

Answer 9

EMF= E⁰ cathode - E⁰ anode

Question 10

EMF>0.3

Answer 10

The reaction is spontaneous and complete

Question 11

Using the electrochemical classification: where is the anode and where is the cathode

Answer 11

|
|■=>cathode
|
|■=>anode

Question 12

From where to where do the e-s migrate?

Answer 12

From the anode to the cathode

Question 13

Pd²± has the most?

Answer 13

Oxidizing power

Question 14

When asked about the role of the salt bridge we should also mention the?

Answer 14

Mass and concentration

Question 15

Cell notation is?

Answer 15

• Metal/ion || ion/metal +
  Anode cathode

Question 16

The higher E⁰ represents the

Answer 16

Cathode

Question 17

The lower E⁰ represents the

Answer 17

Anode

Question 18

Using the overall equation the part from the oxidation rxn(metal) is the … and the part from the red half rxn(ion) is the…

Answer 18

Using the overall equation the part from the oxidation rxn(metal) is the anode and the part from the red half rxn(ion) is the cathode

Question 19

Cell notation awal part tene part anode / cathode

Answer 19

Awal part anode tene cathode

Question 20

Electrochemical classification
Higher:
Lower:

Answer 20

Higher cathode
Lower anode

Question 21

When the limiting reaction ends the reaction ?

Answer 21

Ends

Question 22

When they say indicate the anode and the cathode we write them as?
Example :Sn²±/Sn ?
H+/H²/Pt ?

Answer 22

We write them as redox couples
Anode=> Sn²±/Sn
Cathode =>H+/H²/Pt

Question 23

Steps of table of progress

Answer 23

1- Calculate the initial number of moles of reactants and products
2- Identify the limiting reactant
3-table t=0
🔺️ t
t
t ♾️
4-at t ♾️ nAg+=> ….=0
….mass from n

Question 24

Q=

Answer 24

Q=i×t

Question 25

Q= (ANOTHER WAY)

Answer 25

Q= Ne-×|e|
ne-=Ne-/NA NA=6.023×10²³
Fe => Fe²+ +2e‐ (Stoichiometry)
(nFe/1)reacted = ne‐/2

Question 26

Combined rule

Answer 26

I×t= ne‐ × NA ×|e|

Question 27

How to convert 2 hours 56 mins into seconds ?

Answer 27

2÷3600+56÷60= 10600