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pH Flashcards

(12 cards)

1
Q

Name two indicators

A

Methyl orange and Phenolphthalein

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2
Q

What colour is methyl orange at low pH

A

Red

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3
Q

What colour is methyl orange at a high pH

A

Yellow

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4
Q

What colour is phenolphthalein at a low pH

A

Colourless

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5
Q

What colour do is phenolphthalein at a high pH

A

Pink

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6
Q

Which indicator do you use for a
๐“ข๐“ฝ๐“ป๐“ธ๐“ท๐“ฐ ๐“ช๐“ฌ๐“ฒ๐“ญ / ๐”€๐“ฎ๐“ช๐“ด ๐“ซ๐“ช๐“ผ๐“ฎ

A

Methyl orange

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7
Q

Which indicator do you use for a
๐“ฆ๐“ฎ๐“ช๐“ด ๐“ช๐“ฌ๐“ฒ๐“ญ / ๐“ผ๐“ฝ๐“ป๐“ธ๐“ท๐“ฐ ๐“ซ๐“ช๐“ผ๐“ฎ

A

Phenolphthalein

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8
Q

What is a ๐“‘๐“พ๐“ฏ๐“ฏ๐“ฎ๐“ป

A

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

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9
Q

What symbol is used to find pH of a weak acid

A

Ka

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10
Q

What symbol is used to find pH of a strong acid

A

Kw

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11
Q

What is a buffer made up from

A

Weak bases and one of its salts

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12
Q

How do you calculate pKa

A

pKa = -log10(Ka)

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