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Question 9
The unbalanced equations for two redox reactions, in which SO2 is involved, are shown below. 9.1 Explain what is meant by the term redox reaction. (2) 9.2 Write down the oxidation number of Mn in: 9.2.1 KMnO4 (1) 9.2.2 MnSO4 (1) 9.3 Is Mn in Reaction 2 OXIDISED or REDUCED? Give a reason for the … Read more
Question 2
Respond to ONE of the following transactional writing tasks. The body of your response should be between 120 and 150 words in length. Write down the number and the heading of the text you have chosen, e.g. 2.1 FRIENDLY LETTER. Pay particular attention to format, language and register. Spend approximately 40 minutes on this section. … Read more
Question 8
8.1 Consider the balanced equations for the reaction of water with nitric acid and ammonia below 8.1.1 Define an acid in terms of the Lowry-Brønsted theory. (2) 8.1.2 Write down the FORMULA of ONE conjugate acid-base pair in Reaction 1. (2) 8.1.3 Is the solution formed in Reaction 1 ACIDIC or BASIC (ALKALINE)? Give a … Read more
Question 7
The balanced equation for the reaction of carbon with steam is as follows: C(s) + H2O(g) → CO(g) + H2(g) The graph below, NOT drawn to scale, represents the change in potential energy ofthe substances during the reaction. 7.1 Define the term heat of reaction. (2) 7.2 Is the reaction ENDOTHERMIC or EXOTHERMIC? Give a … Read more