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Abi Science 2016 > Acids, Bases And pH Value > Flashcards

Acids, Bases And pH Value Flashcards

1
Q

Do acids have more or less Hydrogen?

A

More

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2
Q

What is pH?

A

The potency of Hydrogen in a substance

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3
Q

Do acids have more or less Hydrogen?

A

More

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4
Q

How can substances be classified?

A

Acids
Bases
Neutrals

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5
Q

What are the properties of acids?

A

They often taste sour
They can be corrosive
They have a pH of 6.9 or lower

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6
Q

What are the properties of bases?

A

They often taste bitter
Feel soapy
Have a pH of 7.1 or higher

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7
Q

What is the pH scale?

A

A scale of numbers that indicates the strength of acids and bases

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8
Q

What is the scale range of the pH scale?

A

0-14

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9
Q

What is the pH of a neutral substance?

A

7

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10
Q

What are indicators?

A

Special chemicals that help to determine the pH of a substance

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11
Q

How do indicators show pH?

A

They change colour

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12
Q

What indicators are there?

A 
Litmus paper
Red cabbage water
Bromothymol blue
Universal Indicator 
Phenolphthalein
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13
Q

What range of colours will Universal Indicator turn in an acid?

A

Red
Orange
Yellow

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14
Q

What range of colours will Universal Indicator turn in a base?

A

Purple
Blue
Turquoise

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15
Q

What are examples of acids?

A

Dairy products
Lemon juice
Vinegar
Tea

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16
Q

What are examples of bases?

A

Drain cleaner

Bicarbonate of soda

17
Q

What is an example of a neutral substance?

A

Distilled water

18
Q

With UI, what colour is the pH value 1-2?

A

Red

19
Q

With UI, what colour is the pH value 3-4?

A

Orange

20
Q

With UI, what colour is the pH value 5-6?

A

Yellow

21
Q

With UI, what colour is the pH value 7?

A

Lime green

22
Q

With UI, what colour is the pH value 8?

A

Green

23
Q

With UI, what colour is the pH value 9?

A

Turquoise

24
Q

With UI, what colour is the pH value 10?

A

Light blue

25
Q

With UI, what colour is the pH value 11?

A

Dark blue

26
Q

With UI, what colour is the pH value 12-14?

A

Purple

Abi Science 2016 (16 decks)

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