30 Questions
What is the pH value of a neutral substance?
Equal to 7
What is the characteristic of acids that can be used to distinguish them from bases?
Taste sour and feel rough
What is the function of an indicator in a solution?
To show whether the solution is acidic or basic
What is the pH range of the pH scale?
1 to 14
Who first described the term 'pH' in 1909?
Søren Peter Lauritz Sørensen
Which of the following is an example of a base?
Bicarbonate of soda
What does 'pH' stand for?
Power of Hydrogen
What is the pH of a neutral substance?
pH 7
Which of the following is an example of a strong acid?
Lemon juice
What is used to measure the pH of a solution?
Indicators
Which of the following is a characteristic of both acids and bases?
Corrosiveness
What does a pH value of 7 indicate?
A neutral substance
What is the purpose of an indicator in a solution?
To show whether the solution is acidic or basic
What is the pH range of acidic substances?
Below 7
Which of the following substances is an example of an acid?
Vinegar
What is the main difference between lemon juice and orange juice in terms of pH?
Lemon juice has a lower pH than orange juice.
Why is it important to maintain the right pH in swimming pool water?
To ensure the water is neutral.
What is the characteristic of a strong acid?
It has a pH close to 1.
What is the purpose of 'pH balanced' shampoo?
To make the shampoo neutral, matching the pH of the hair.
What is the relationship between the pH of a substance and its acidity?
As the pH increases, the substance becomes more basic.
What is the primary reason why lemon juice has a lower pH than orange juice?
Lemon juice has a higher concentration of hydrogen ions
What is the purpose of maintaining a neutral pH in skin soap?
To balance the pH of the skin
What happens to the pH of a substance as it becomes more basic?
The pH increases towards 14
Why is it important to monitor the pH of swimming pool water?
To ensure the water is within a safe range for swimmers
What is the relationship between the pH of a substance and its strength as an acid or base?
A stronger acid has a lower pH, and a stronger base has a higher pH
What is the primary purpose of using an indicator in a solution?
To identify whether the solution is acidic or basic
What is the characteristic that distinguishes acidic taste from basic taste?
Sour taste indicates an acid, while bitter taste indicates a base
What happens to the pH value of a solution when an acid is added to it?
The pH value decreases
What is the relationship between the feel of a substance and its classification as an acid or base?
Acids feel rough, while bases feel slippery
What is the range of pH values for neutral substances?
pH 7 only
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