Chapter 2

Question 1

What is the ACID And BASE according to the Arrhenius theory

Answer 1

Acid is substances that ionises in water to give hydrogen ions (H+)
For example HCl

Base Is substances that are you nice to give hydroxide ions (OH)
For example NAOH

Question 2

What is acid and base according to Bronsted-Lowry theory

Answer 2

Acid is the substance which donate Proton

Base is the substance which accept proton 

Question 3

Bronsted - Lowry theory assumes …

Answer 3

Transfer of protons from an ACID to a BASE
Conjugate pairs 

Question 4

Free protons do not exist in the solution that’s why we can write a half reaction
True or false 

Answer 4

True

Question 5

The acid and Base Off a half reaction are called

Answer 5

Conjugate Pairs

Question 6

Define the amphoteric and give an example

Answer 6

Is a species that can act as an acid or base
For example the water

Question 7

Define the Conjugate base

Answer 7

Species that remains after an ACID donates it is H+

Question 8

Define conjugate Acid

Answer 8

Species remains after base accept H+

Question 9

What is the acid and base according to lewes theory

Answer 9

Acid is the substance which accept lone pairs of electrons
For example ALCL3

Base is substance which donate lone pairs of electrons
for example NH3

Question 10

Lewis theory assume what

Answer 10

Donation of electrons from a base to an acid

Question 11

Classified the solutions

Answer 11

Electrolyte which dissociate and conduct electricity

None electrolytes Which don’t ionise and don’t conduct electricity 

Question 12

When an acid or base is dissolved in water the Amount of disassociation depend on

Answer 12

The strength of the ACID, BASE

Question 13

Give an example for weak acid and strong acid

Answer 13

Strong acid: hydrochloride acid HCl 
weak acid: Acetic acid CH3COOH 

Question 14

Give an example for strong base and weak base

Answer 14

Strong base NAOH
Weak base NH4OH

Question 15

Define the Kw and it’s product of what

Answer 15

It is the molar equilibrium constant
It’s Product of the hydrogen concentration and hydroxide ion concentration [H+][OH-]

Question 16

KW equal what at 25°

Answer 16

10^-14

Question 17

True or false H2O is weekly dissociated

Answer 17

True

Question 18

In pure water the concentration of hydrogen and hydroxide is ..

Answer 18

Equal each other [H+]=[OH-]

Question 19

1 - define the pH of a solution
2- Define the pOH of a solution


Answer 19

PH= -log[H]
POH= -log[OH]

Question 20

Define the Pkw and what’s equall

Answer 20

It is the addition of PH with POH 
= PH+POH
It’s equal 14 

Question 21

 True or false
If PH value increases
[H] concentration decreases

Answer 21

True

Question 22

Determine the PH of ..
acid
alkaline
neutral 

Answer 22

Acid solution has pH less than 7
Alkaline solution has a pH more than 7
Neutral Solution  has PH = POH = 7

Question 23

Give an example for ( salt of strong acid and strong base ) and determine the PH

Answer 23

NaCl ,
Always neutral pH=7

Question 24

Define the relationship of Ka,[H3O+] and PH

INCREASE IN ACID STRINGTH

Answer 24

Ka, [H3o+] increase
PH decrease

Question 25

Define the relationship of kb,[H3O+] and PH

INCREASE IN BASE STRINGTH

Answer 25

Kb, PH increase
[H3O+] decrease