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Science: Acids And Alkali (Chemistry) > Alkali/ Bases And More > Flashcards

Alkali/ Bases And More Flashcards

1
Q

E.g. of bases/ alkali

A

Soap
Indigestion tablets
Wasp stings
Baking powder
Toothpaste
Paint stripper
Ammonia cleaning fluid

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2
Q

What is a base

A

A substance that can accept hydrogen ions in water and can neutralize an acid.
The Base Sodium Hydroxide will also dissociate when placed in water

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3
Q

What makes a solution basic

A

The free hydroxide ions make the Solution basic, the more hydroxide ions there is, the more basic it is

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4
Q

Ions

A

Atoms that have gained or lost an electron

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5
Q

E.g. of everyday bases

A

Toothpaste
Bleach
Indigestion tablets

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6
Q

E.g. of lab bases

A

Sodium hydroxide (NaOH)
Calcium carbonate
Limewater

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7
Q

What if we want to know where something is on the pH scale

A

Use a special solution (paper) called universal indicator to test acids and alkalis.

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8
Q

How do we find out if something is an acid or base

A

Use Litmus paper

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9
Q

Litmus paper: acid

A

Blue litmus turns red

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10
Q

Litmus paper: base

A

Red litmus paper turns blue

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11
Q

Litmus paper: neutral

A

Stays the same

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12
Q

pH of an acid

A

Anything below or a 6

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13
Q

pH of a alkali

A

Anything above or a 8

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14
Q

What happens to the strength of an acid as the pH decreases

A

Gets stronger (the strength of the acid increases)

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15
Q

What happens to the strength of an alkali as the pH increases

A

Gets stronger (the alkali gets stronger)

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16
Q

pH 5 is

A

Mildly acidic

17
Q

pH 14 is

A

Highly alkaline

18
Q

What does the pH indicate

A

The bascity or the acidity of a substance

19
Q

Alkali

A

Soluble base

20
Q

Why is called a neutralisation reaction

A

It’s because we’re making water

21
Q

Hydrochlauric acid + _____ hydroxide =

A

_____ chloride + water

22
Q

Titration

A

A lab method used to determine the concentration of an acid or a base in solution by performing a neutralisation reaction with a standard solution

23
Q

What colour does the universal indicator turn in a strong acid

A

Purple

24
Q

Neutralisation

A

Chemical reaction between an alkali and acid

25
Q

pH of neutral solution

A

7

26
Q

pH of strong/ dangerous acid

A

1

Science: Acids And Alkali (Chemistry) (2 decks)

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