pH Flashcards
1
Q
Name two indicators
A
Methyl orange and Phenolphthalein
2
Q
What colour is methyl orange at low pH
A
Red
3
Q
What colour is methyl orange at a high pH
A
Yellow
4
Q
What colour is phenolphthalein at a low pH
A
Colourless
5
Q
What colour do is phenolphthalein at a high pH
A
Pink
6
Q
Which indicator do you use for a
𝓢𝓽𝓻𝓸𝓷𝓰 𝓪𝓬𝓲𝓭 / 𝔀𝓮𝓪𝓴 𝓫𝓪𝓼𝓮
A
Methyl orange
7
Q
Which indicator do you use for a
𝓦𝓮𝓪𝓴 𝓪𝓬𝓲𝓭 / 𝓼𝓽𝓻𝓸𝓷𝓰 𝓫𝓪𝓼𝓮
A
Phenolphthalein
8
Q
What is a 𝓑𝓾𝓯𝓯𝓮𝓻
A
A buffer of a a solution the resists changes in pH when small amount of the acid Are added or when its diluted
9
Q
What symbol is used to find pH of a weak acid
A
Ka
10
Q
What symbol is used to find pH of a strong acid
A
Kw
11
Q
What is a buffer made up from
A
Weak bases and one of its salts
12
Q
How do you calculate pKa
A
pKa = -log10(Ka)
