Worksheetsacidity and alkalinity year 7
Total questions: 24
Worksheet time: 22mins
The pH scale ranges from
1-7
0-14
0-20
1-14
A pH of 2 would be a
weak base
neutral
strong acid
weak acid
strong base
A pH of 8 would be a
weak base
neutral
strong acid
weak acid
strong base
What colour is a neutral pH
Green
Red
Orange
Purple
_____ has a neutral pH
Bleach
Water
Orange Juice
Blood
Acids AND bases can be corrosive
True
False
Acid taste ....................... .
Rasa asid adalah .................... .
(a)
What is the pH scale used to measure?
temperature
weight
acidity or alkalinity
density
What is the pH value of acidic solutions?
Equal to 7
More than 7
Negative
Less than 7
Examples of an alkali
Soap
Vinegar
Toothpaste
Lemon
Examples of an alkali
Soap
Vinegar
Toothpaste
Lemon
What is an acid
Sour substance
Soapy substance
Water
Clay
What are acids and alkalis
Corrosive
Reactive
Irritant
What does irritant mean
It cuts you
It burns you
It makes you have a rash
It makes you smell
What does corrosive mean
It burns your eyes and skin
It itches you
It stings you
It makes you smell nice
What has a sour taste?
acid
base
neither
both
turns red litmus paper blue
Acid
Base
According to the pH scale, which of the following pH values would be the strongest acid?
0
4
8
14
According to the pH scale, which of the following pH values would be the strongest base?
0
4
8
14
What does the pH scale measure?
Temperature
Acidity or alkalinity
Density
Volume
What is the pH range of acidic substances on the pH scale?
0 to 7
7 to 14
1 to 14
0 to 14
If a substance has a pH of 9, is it acidic, alkaline, or neutral?
Acidic
Alkaline
Neutral
It depends on the substance
Lemon juice has a pH of about 2. What can you conclude about its acidity?
It is acidic.
It is alkaline.
It is neutral.
It is not possible to determine.
