6.2 Complete the following chemical equation by writing the correct chemical formula in the spaces provided. CaCO3  + [1] → CaCl2+ [2]+ [3] (3)

2.2 An example of a neutral substance is cooking oil. (1)  

6.4 Complete the following chemical equation by writing down the names of the products in the space provided. Hydrochloric acid + magnesium oxide → [1] + [2] (2)

4.4 Why does phosphorus react spectacularly with oxygen?  (1)

QUESTION 2 Indicate whether the following statements are True or False by choosing the correct option.  2.1 A weak acid has a low pH value. (1)

6.5 Write the balanced chemical equation for the completed word equation in question 6.4.  (2)  

6.3 Write down the general word equation for the reaction between an acid with a metal oxide. (2)  

TEST INSTRUCTIONS 1. Answer section A, B and C 2. Read through your questions carefully before you start answering. 3. When balancing equations, place the footers in brackets. 4. Answer all the questions. 5. Use the mark allocation as a guide as to how much information is needed in your answer. 6. You may use a calculator if necessary. 7. GOOD LUCK!  

4.5 Hydrogen and oxygen also react spectacularly. Describe what will happen if hydrogen and oxygen react with each other. (2)

5.6 What is the pH-value of water? (1)