(20) Acids And Bases

Question 1

What is a neutralisation reaction?

Answer 1

A reaction between acids and bases to form water and the salt

Question 2

Bronsted Lowry Base

Answer 2

Proton acceptor

Question 3

Bronsted Lowry acid

Answer 3

Proton donors

Question 4

How is water amphoteric?

Answer 4

Can act as an acid or a base depending on what its reacting with

Question 5

What is an acid - base reaction ?

Answer 5

When a proton is transferred from an acid to a base

Question 6

What is the conjugate acid?

Answer 6

The previous base ( the base that gains the proton )

Question 7

What is the conjugate base?

Answer 7

The previous acid ( loses a proton )

Question 8

Why can’t you compare acid strength with pH

Answer 8

Because you must take into account concentrations

Question 9

What does a small ka indicate about an acid ?

Answer 9

Strong acid

Question 10

What does a small ka indicate about an acid ?

Answer 10

That the acid is weaker

Question 11

What does Kb mean?

Answer 11

This is the efficiency of a base picking up an extra proton to form the conjugate acid

Question 12

At room temperature, what does Kw =

Answer 12

1x10-14 mol2mdm-6

Question 13

What is the relationship between Kw Ka and KB

Answer 13

Kw= KaxKb

Question 14

pKa < 0 what does this indicate about an acid ?

Answer 14

Strong - most of the acid has deprotonated into an aqueous solution

Question 15

pKa>0 what does this indicate about the acid

Answer 15

Weak - the acid doesn’t dissociate in an aqueous solution

Question 16

What is the Henderson-Hasselbach equation?

Answer 16

pH = pKa + log ( [X-]/ [HX])

Question 17

What happens when [X-]=[HX]

Answer 17

pKa and pH are equal

Question 18

What is the conjugate acid of ammonia, NH3

Answer 18

NH4+