The table shows the pH of some substances found in a home.
| Substance | pH |
|---|---|
| oven cleaner | 13 |
| lemon juice | 2 |
| pure water | 7 |
| vinegar | 3 |
| baking soda solution | 8 |
Which substance is the most acidic?
Which substance is neutral?
Which substance is the most alkaline?
Complete the sentences about acids and alkalis.
Use words from the list: hydrogen, hydroxide, neutralisation, oxidation, oxide, salt, sugar
When an acid dissolves in water, it forms ...... ions. Solutions of alkalis contain ...... ions. An acid reacts with an alkali to make a ...... and water. This type of reaction is called ...... .
A student wants to measure the pH of the vinegar.
Describe how the student could use universal indicator to find the pH of the vinegar.
53 exam-style questions on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one has a worked solution and a mark scheme showing where the marks go.