Acids and Bases year 10 science chemistry.pptx

science slides for yr 10 class

1. Acids and Bases

2. Acids Corrosive Taste sour All common acids contain at least one hydrogen atom 0-7 on the pH scale

3. Bases Corrosive Taste bitter Slippery or soapy to touch Able to accept a hydrogen ion from an acid Bases are the chemical opposites of acids Bases that dissolve in water are called alkalis, and the solution that forms is called an alkaline solution

4. Neutralisation Reaction A reaction involving an acid and a base, producing water and a salt

5. Indicators Substances that change colour when added to acidic or alkaline solutions Natural indicators exist (vegetables like red cabbage)

6. Recall your prac involving testing universal indicator and the mystery indicator on household items to answer the following questions Predict what would happen when the mystery indicator was added to: An acid with a pH of 5 A solution with a pH of 1 A solution with a pH of 12 A base with a pH of 8 An unknown solution is in a test tube. When universal indicator was added it turned yellow. Describe this substance as acidic/basic/neutral and weak/strong. An unknown solution is in a test tube. When the mystery indicator was added it turned pink. Describe this substance as acidic/basic/neutral and weak/strong.

7. Research activity: Research and describe 5 neutralisation reactions that occur in everyday life Research 3 important acids and bases for humans. Explain how its acidic/basic properties support its purpose Put your work on a google doc to submit in google classroom