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Chemistry > Acids and Alkalis > Flashcards

Acids and Alkalis Flashcards

1
Q

What hazards are associated with acids and alkalis?

A

Corrosive
Health Hazard
Extreme Health Hazard

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2
Q

What does corrosive mean?

A

Can damage body tissues e.g. skin and eyes

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3
Q

Name some safety precautions when using acids and alkalis

A

Wear googles
Do not eat or drink in the lab

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4
Q

Give 3 examples of acids

A

lemon juice, hydrochloric acid, sulphuric acid

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5
Q

Give 3 examples of alkalis

A

baking soda, washing up liquid, bleach, Sodium Hydroxide

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6
Q

What colours indicate an acid using universal indicator?

A

Red (strongest) to orange to yellow (weakest)

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7
Q

What colour is neutral using universal indicator?

A

Green

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8
Q

What colours indicate an alkali using universal indicator?

A

Blue to Purple (strongest)

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9
Q

What number range is acid on the pH scale?

A

1-6 (1 = strongest acid)

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10
Q

What number is neutral on the pH scale?

A

7

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11
Q

What number range is alkali on the pH scale?

A

8-14 (14 = strongest alkali)

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12
Q

Name 3 indicators

A

Universal indicator, Phenolphthalein, red cabbage, litmus, methyl orange

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13
Q

What is meant by neutralisation?

A

An acid reacts with an alkali to form a salt + water

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14
Q

Give an example of a useful neutralisation reaction

A

Brushing teeth with toothpaste
Indigestion tablets
Treating wasp sting with vinegar

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15
Q

Hydrochloric acid + Sodium Hydroxide =

A

Sodium Chloride + Water

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16
Q

Nitric Acid + Sodium Hydroxide =

A

Sodium Nitrate + Water

17
Q

Sulfuric Acid + Sodium Hydroxide =

A

Sodium Sulfate + Water

18
Q

Magnesium + Hydrochloric Acid

A

Magnesium Chloride + Hydrogen

19
Q

Acid + Alkali =

A

Salt + Water

20
Q

Metal + Acid=

A

Salt + Hydrogen

21
Q

Metal Oxide + Acid =

A

Salt + Water

22
Q

Sodium Oxide + Hydrochloric Acid =

A

Sodium Chloride + Water

23
Q

Magnesium Oxide + Nitric Acid =

A

Magnesium Nitrate + Water

24
Q

What colour does litmus turn in acid and alkali?

A

Acid = red, Alkali= Blue

25
Q

What colour does Methyl orange turn in acid and alkali?

A

Red = acid
Orange = alkali

26
Q

What colour does red cabbage turn in acid and alkali?

A

Pink in acid
Green in alkali

27
Q

What is the chemical formula for Sulfuric acid?

28
Q

What is the chemical formula for Sodium Hydroxide?

29
Q

What is the chemical formula for Potassium Hydroxide?

30
Q

What is the chemical formula for Hydrochloric Acid?

Chemistry (1 decks)

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