Acids And Bases

Question 1

Def Brønsted-Lowry acid

Answer 1

Proton donor

Question 2

Def Brønsted-Lowry base

Answer 2

Proton acceptor

Question 3

What causes a solution to become acidic

Answer 3

Hydrogen ions or H3O+ ions

Question 4

What causes a solution to be alkaline

Answer 4

OH- ions

Question 5

Equation for the ionisation of water

Answer 5

H2O ⇌ H3O+ + OH-

Question 6

Why is water still neutral even if pH does not equal 7

Answer 6

OH- = H+

Question 7

Expression for pH in terms of H+

Answer 7

pH = -logH+

Question 8

Relationship between pH and conc of H+

Answer 8

Lower pH = higher conc H+

Question 9

If solutions have a difference of pH 1, what’s the difference between them

Answer 9

X10

Question 10

How do you find H+ ions from pH

Answer 10

H+ = 10^-pH

Question 11

Define strong acid

Answer 11

Completely dissociates

Question 12

Define strong base

Answer 12

Fully dissociates in water

Question 13

Difference between concentrated and strong

Answer 13

Concentrated means many Mol/Dm
Strong refers to amount of dissociation

Question 14

Whats a weak acid/base

Answer 14

Only partially dissociates

Question 15

Examples of strong acids

Answer 15

HCL
H2SO4
H3PO4

Question 16

Examples of strong bases

Answer 16

NaOH
CaCO3
Na2CO3

Question 17

Example of a weak acid

Answer 17

Carboxylic acid

Question 18

Example of weak base

Answer 18

Nh3

Question 19

Ka expression

Answer 19

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

Question 20

How would you work out pH of a weak acid

Answer 20

Sub into Ka, values of A and HA
Use pH=-LogH+

Question 21

Def buffer solution

Answer 21

A solution that can oppose the chain of pH

Question 22

What do acidic buffer solutions contain

Answer 22

A weak acid and a salt of that acid