Acids, Bases And pH Value Flashcards Preview

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

Flashcards in Acids, Bases And pH Value Deck (26):
1

Do acids have more or less Hydrogen?

More

2

What is pH?

The potency of Hydrogen in a substance

3

Do acids have more or less Hydrogen?

More

4

How can substances be classified?

Acids
Bases
Neutrals

5

What are the properties of acids?

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

6

What are the properties of bases?

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

7

What is the pH scale?

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

8

What is the scale range of the pH scale?

0-14

9

What is the pH of a neutral substance?

7

10

What are indicators?

Special chemicals that help to determine the pH of a substance

11

How do indicators show pH?

They change colour

12

What indicators are there?

Litmus paper
Red cabbage water
Bromothymol blue
Universal Indicator
Phenolphthalein

13

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

Red
Orange
Yellow

14

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

Purple
Blue
Turquoise

15

What are examples of acids?

Dairy products
Lemon juice
Vinegar
Tea

16

What are examples of bases?

Drain cleaner
Bicarbonate of soda

17

What is an example of a neutral substance?

Distilled water

18

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

Red

19

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

Orange

20

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

Yellow

21

With UI, what colour is the pH value 7?

Lime green

22

With UI, what colour is the pH value 8?

Green

23

With UI, what colour is the pH value 9?

Turquoise

24

With UI, what colour is the pH value 10?

Light blue

25

With UI, what colour is the pH value 11?

Dark blue

26

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

Purple