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WorksheetsIndicator and pH QzL
Total questions: 23
Worksheet time: 14mins
Identify acids, alkalis, and neutral solutions on the pH scale.
Acids have pH less than 7, alkalis have pH more than 7, and neutral solutions have pH equal to 7.
Acids have pH more than 7, alkalis have pH less than 7, and neutral solutions have pH equal to 7.
Acids and alkalis both have pH equal to 7, and neutral solutions have pH less than 7.
Acids have pH equal to 7, alkalis have pH equal to 7, and neutral solutions have pH more than 7.
Identify the best indicator to distinguish between solutions of different pH.
Litmus paper
Phenolphthalein
Methyl orange
Universal indicator
Use data and observations to determine the pH of a solution.
The pH is acidic
The pH is neutral
The pH is basic
The pH cannot be determined
A student has two beakers. One contains an acid and the other contains an alkaline solution. How can he find out which is which?
By using litmus paper
By tasting the solutions
By smelling the solutions
By shaking the beakers
State what an indicator is.
An indicator is a device that shows the state or level of something.
An indicator is a type of fruit.
An indicator is a musical instrument.
An indicator is a type of clothing.
Which plants make good indicators?
Lichens
Cacti
Roses
Sunflowers
What color does red cabbage juice turn in dilute hydrochloric acid?
red
blue
green
yellow
What color does hibiscus flower juice turn in dilute sodium hydroxide solution?
dark green
red
blue
yellow
What color does beetroot juice turn in dilute sodium hydroxide solution?
yellow
red
green
blue
State the colour change when a student adds an acid to blue litmus paper.
Blue to Red
Red to Blue
No change
Blue to Green
Which is more acidic, vinegar or stomach acid? How can you find out?
Vinegar is more acidic than stomach acid.
Stomach acid is more acidic than vinegar.
Both have the same acidity.
Acidity cannot be compared.
Fill in the blank: Universal indicator is a mixture of dyes. It changes colour to show how _______ or _______ a solution is.
acidic, alkaline
hot, cold
thick, thin
sweet, sour
What is the pH scale a measure of?
On the pH scale, what pH value does an acid have?
Less than 7
7
More than 7
Exactly 7
On the pH scale, what pH value does an alkaline solution have?
Greater than 7
Less than 7
Equal to 7
Exactly 0
What is the pH of a neutral solution?
7
6
8
9
Can you match the pH values to the Universal Indicator colours?
pH 5
pH 5
pH 3
pH 3
pH 11
pH 11
pH 14
pH 14
pH 1
pH 1
Use the data in the table to list the names of the solutions in order of increasing acidity, starting with the least acidic.
Solution A, Solution B, Solution C
Solution C, Solution B, Solution A
Solution B, Solution A, Solution C
Solution C, Solution A, Solution B
Choose the correct bold words. On the pH scale, acids have a pH of (a) 7.0.
less than
more than
Choose the correct bold words. The higher the pH, the (a) acidic the solution.
more
less
Choose the correct bold words. A solution is alkaline if its pH is (a) 7.0.
more than
less than
Choose the correct bold words. A solution of pH of (a) /0 is neutral.
7.0
0
Mr Johar gives Daisy two solutions. He tells her to choose the best indicator to find out which solution is of pH 4 and which is pH 6. Which indicator should Daisy use?
Litmus paper
Phenolphthalein
Methyl orange
Universal indicator
