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Introduction
Introduction
Acids, bases and alkalis are found in the laboratory and at home. In this topic you will learn about different reactions containing these chemicals as well as how to stay safe when you use them.
Enjoy the song but NOTE: you should always wear googles when handling acids and bases for reasons you will discover in the lessons.
Task 1: Know
Task 1: Know
Task 1: Use look, cover, write check to learn the answers to the core questions and the keywords for this topic
Learn
Learn
Task 2: What are acids and bases?
Task 2: What are acids and bases?
Task 2c: Make notes that:
List substances that you might have come across in everyday life with these hazard symbols on
List examples of acids from our everyday lives
Design an information card with instructions for how we can safely use acids in school. Include:
The 3 hazard symbols to look out for
The safety precautions you should take
What to do if you have an accident
Task 3: What are indicators?
Task 3: What are indicators?
Task 3c: Make notes that:
Define indicator
Describe what happens to red and blue litmus paper in:
An acid
An alkali
A neutral substance
Describe the limitations for using litmus paper as an indicator
Describe how to make red cabbage indicator
Compare red cabbage indicator and litmus paper
Decide which is the best indicator and why
Task 3d: Complete the exam question and mark it using the answers in the slides
Task 4: What is the range of acids and bases?
Task 4: What is the range of acids and bases?
Task 4c: Make notes that:
Describe substances which are: (use the pH scale)
pH 1
pH 14
pH 9
pH 4
pH 7
Describe how universal indicator is used to identify acids and alkalis
Suggest what colour universal indicator would turn in bleach
Suggest what colour universal indicator would turn in stomach juices
Suggest which indicator (litmus paper, red cabbage or universal indicator) is better and explain why.
Task 4d: Complete the progress quiz
Task 5: What happens when you add an acid to a base?
Task 5: What happens when you add an acid to a base?
Task 5b: Make notes that:
Describe what is produced when acids and bases react
Define:
Acid
Base
Alkali
Neutral
Neutralisation
Describe how to name salts
Complete the following word equations:
Magnesium hydroxide + Nitric acid → Magnesium ______ + water
Sodium hydroxide + Sulphuric acid → ______ sulphate + water
Lithium hydroxide + Hydrochloric acid → ______ _____ + water
______ hydroxide + ________ acid → Potassium nitrate + water
Task 5c: Complete the exam question and mark it using the answers in the slides.
Task 6: Making copper sulphate crystals
Task 6: Making copper sulphate crystals
Task 6c: Make notes that:
Describe how to create pure copper sulphate crystals
Explain why copper oxide needed to be added until some remained after stirring
Describe what is happening to the particles at this stage
Write a word equation for the reaction
Explain why filtering the solution was necessary
Describe what is happening to the particles at this stage
Explain why evaporating the solution was necessary
Describe what is happening to the particles at this stage
Task 7: Applications of neutralisation
Task 7: Applications of neutralisation
Task 7c: Make notes that:
Define an antacid
Explain how antacids work.
Describe what is produced when a carbonate reacts with an acid
Task 7d: For the experiment described in the slides:
Give the independent variable
Give the dependent variable
List some control variables
Write a brief method
Suggest how this method could be improved
Task 7e: Complete the exam question and mark it using the answers in the slides
Task 8: What happens when you add metal to acid?
Task 8: What happens when you add metal to acid?
Task 8c: Make notes that:
Describe what is produced when you add a metal to acid
Describe how to test for hydrogen gas
Complete word equations for:
Zinc + Hydrochloric acid →
Aluminium + Sulphuric acid →
Copper + Nitric acid →
Task 8d: Complete the exam questions and mark your answers
Task 9: Summary
Task 9: Summary
Task 9a: Watch the video
Task 9c: Make a mind map or single page revision summary of this topic and add it to your revision folder
Check
Check
Complete the quiz to make sure you understand this unit.
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