pH

Question 1

Name two indicators

Answer 1

Methyl orange and Phenolphthalein

Question 2

What colour is methyl orange at low pH

Answer 2

Red

Question 3

What colour is methyl orange at a high pH

Answer 3

Yellow

Question 4

What colour is phenolphthalein at a low pH

Answer 4

Colourless

Question 5

What colour do is phenolphthalein at a high pH

Answer 5

Pink

Question 6

Which indicator do you use for a
𝓢𝓽𝓻𝓸𝓷𝓰 𝓪𝓬𝓲𝓭 / 𝔀𝓮𝓪𝓴 𝓫𝓪𝓼𝓮

Answer 6

Methyl orange

Question 7

Which indicator do you use for a
𝓦𝓮𝓪𝓴 𝓪𝓬𝓲𝓭 / 𝓼𝓽𝓻𝓸𝓷𝓰 𝓫𝓪𝓼𝓮

Answer 7

Phenolphthalein

Question 8

What is a 𝓑𝓾𝓯𝓯𝓮𝓻

Answer 8

A buffer of a a solution the resists changes in pH when small amount of the acid Are added or when its diluted

Question 9

What symbol is used to find pH of a weak acid

Answer 9

Ka

Question 10

What symbol is used to find pH of a strong acid

Answer 10

Kw

Question 11

What is a buffer made up from

Answer 11

Weak bases and one of its salts

Question 12

How do you calculate pKa

Answer 12

pKa = -log10(Ka)