3.1.12 - Acids and Bases

Question 1

Bronsted-Lowry acid

Answer 1

Proton Donor

Question 2

Bronsted-Lowry base

Answer 2

Proton Acceptor

Question 3

Strong acid

Answer 3

An acid that completely dissociates to ions when in solution with pH 3-5

Question 4

Weak acid

Answer 4

An acid that only slightly dissociates when in solution with pH 0-1

Question 5

Methyl Orange

Answer 5

red on acid side, pH at colour change is 3-5, yellow on basic side

Question 6

Methyl Orange

Answer 6

red on acid side, pH at colour change is 3-5, yellow on basic side

Question 7

Litmus

Answer 7

red on acid side, pH at colour change is 5-8, blue on basic side

Question 8

Phenolphthalein

Answer 8

colourless on acid side, pH at colour change is 8-10, pink on basic side

Question 9

Acidic buffer solutions

Answer 9

contain a weak acid and the salt of that weak acid

Question 10

Basic buffer solutions

Answer 10

contain a weak base and the salt of that weak base

Question 11

A Buffer solution

Answer 11

a solution which is able to resist changes in pH when small volumes of acid or base are added

Question 12

Uses of Buffers

Answer 12

Common in nature in order to keep systems regulated. Enzymes or reactions in living organisms often require a specific pH which can be maintained using a buffer solution