Podcast
Questions and Answers
______ and alkalis are used to test the pH of substances.
______ and alkalis are used to test the pH of substances.
Indicators
______ is an indicator that turns red in acids.
______ is an indicator that turns red in acids.
Litmus
Common ______ include vinegar and lemon juice.
Common ______ include vinegar and lemon juice.
acids
______ signs are used to warn people of chemical hazards.
______ signs are used to warn people of chemical hazards.
Signup and view all the answers
The pH scale runs from ______ to 14.
The pH scale runs from ______ to 14.
Signup and view all the answers
Alkalis can cancel out ______ to make them neutral.
Alkalis can cancel out ______ to make them neutral.
Signup and view all the answers
Indicators are coloured ______ which often come from plants such as red cabbage and beetroot.
Indicators are coloured ______ which often come from plants such as red cabbage and beetroot.
Signup and view all the answers
Stronger acids such as ______ and nitric acids can be more dangerous.
Stronger acids such as ______ and nitric acids can be more dangerous.
Signup and view all the answers
Weak alkalis include ______ and toothpaste.
Weak alkalis include ______ and toothpaste.
Signup and view all the answers
Bottles in the laboratory and tankers carrying chemicals on the road all have to carry ______ warning labels.
Bottles in the laboratory and tankers carrying chemicals on the road all have to carry ______ warning labels.
Signup and view all the answers
You can find out the pH number using a universal indicator, or by using a ______ meter.
You can find out the pH number using a universal indicator, or by using a ______ meter.
Signup and view all the answers
Neutralising reactions can be important in ______, to make sure the soil is the correct pH.
Neutralising reactions can be important in ______, to make sure the soil is the correct pH.
Signup and view all the answers
Study Notes
Acids and Alkalis
- Indicators are coloured dyes, often derived from plants like red cabbage and beetroot, that change colour in the presence of acids.
- Litmus is an indicator that turns red in acids.
- Common acids include vinegar, lemon juice, fizzy drinks, pickles, and spicy sauces.
Properties of Acids
- Stronger acids like sulphuric and nitric acids can be more dangerous and corrosive.
Alkalis
- Alkalis have a different effect on indicators than acids, with litmus turning blue in alkalis.
- Weak alkalis include soap and toothpaste.
- Like strong acids, alkalis can also be corrosive.
Hazard Warning Labels
- Hazard warning labels are used to indicate chemical hazards on laboratory bottles and chemical tankers.
- Common warning signs include: toxic (poisonous), harmful (irritant), corrosive, and flammable.
pH Scale
- The pH scale measures the strength of acids and alkalis, ranging from 1 to 14.
- pH numbers 1 to 6 are acids, 7 is neutral, and 8 to 14 are alkalis.
Measuring pH
- pH numbers can be determined using a universal indicator or a pH meter.
Neutralising Reactions
- Alkalis can cancel out acids, making them neutral.
- Neutralising reactions are important in:
- Gardening and agriculture to maintain optimal soil pH.
- Treating insect stings and bites.
- Controlling indigestion caused by excess acid in the stomach.
- Maintaining the correct pH in food production, such as in making jam.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the basics of acids and alkalis, including indicators, their effects on substances, and examples of common acids and alkalis. Learn about the differences between acids and alkalis and their characteristics.
