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Chemistry 2021/22 > Acids and Alkali's > Flashcards

Acids and Alkali's Flashcards

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1
Q

Solutions can either be…

A

Acid, alkali or neutral

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2
Q

What is the pH of pure water?

A

7/neutral

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3
Q

What are some acids found in a lab?

A

Hydrochloric acid, sulfuric acid, nitric acid

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4
Q

What are some acids found at home?

A

Lemon juice, vinegar, fizzy drinks

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5
Q

What are some alkalis found at home?

A

Indigestion tablets, baking soda, bleach, toothpaste

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6
Q

What are some alkalis found in the lab?

A

Sodium hydroxide, calcium hydroxide

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7
Q

How do you know if a substance is alkali?

A

It contains the word hydroxide, e.g potassium hydroxide

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8
Q

Why are universal indicators used?

A

They are used to find out whether a solution is acid, alkali or base

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9
Q

What different plants can be used to determine the pH of a solution?

A

Radish, red cabbage, red onion, rhubarb, blueberries

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10
Q

What colours do acidic, neutral and alkaline

A

Acid - Red
Neutral - Green
Alkaline/Base - Purple/blue

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11
Q

What is the pH of acids, alkalis, neutral solutions

A

acid - 0-6
neutral - 7
alkali - 8-14

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12
Q

very alkaline

A

pH - 12 -14

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13
Q

very acidic…

A

pH - 0-2

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14
Q

less acidic

A

pH - 3 - 6

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15
Q

less alkaline

A

pH - 8 - 11

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16
Q

What happens when carbon dioxide is dissolved in water?

A

It makes an acidic solution

17
Q

Burning sulphur produces Sulphur Dioxide, what happens to this when it is dissolved into water?

A

It makes another acidic solution, this is also an example of acid rain

18
Q

What is a neutralisation reaction?

A

It is when an acid and an alkali react with one another with correct proportions and neutralise, this makes a solution with the pH of 7

19
Q

What is an example of neutralisation?

A

Hydrochloric acid is neutralised using sodium hydroxide

This makes sodium chloride (table salt) and water

20
Q

Uses of neutralisation…

A

-Indigestion (too much stomach acid), use indigestion
tablets
-Wasp sting (alkali), use something acidic like vinegar
-Bee sting (acidic), use something alkaline like sodium
bicarbonate

Chemistry 2021/22 (1 decks)

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