Acids And Bases

Question 1

What is a bronsted Lowry acid

Answer 1

A compound that donates protons

Question 2

What is a bronsted Lowry base

Answer 2

A proton accepter

Question 3

What is meant by kw

Answer 3

The ionic product of water kw=[H+] [OH-]

Question 4

What is ph

Answer 4

Ph = -log10[H+]

Question 5

What effect does temperature have on kw

Answer 5

It causes kw and ph to increase as the equilibrium lowers the temperature

Question 6

What is the value for kw

Answer 6

-14

10

Question 7

How do you work out pka

Answer 7

-log Ka

Question 8

How do you work out Ka

Answer 8

10-pka

Question 9

What’s the formula for weak acid dissociation

Answer 9

Ka=. [H+]2

[HA]

Question 10

If the value of Ka is bigger what does that mean about the acid

Answer 10

It means the acid is weaker I

Question 11

If the value of pKa is smaller what does that mean for the acid

Answer 11

It means the acid is weaker

Question 12

What is a buffer solution

Answer 12

Solution that resists changes in ph when small amounts of acid or alkali are added

Question 13

Give the formulas for working out buffer solutions

Answer 13

Ka=[H][A-]
[HA]

[H]=Ka[HA]
[A-]

Ha is the weak acid
A-is the salt

Question 14

What is in an acidic buffer

Answer 14

A weak acid and it’s salt

Question 15

State what happens when an acid is added to an acid buffer

Answer 15

It reacts with the weak acid causing it to increase

While the salt decreases