CO 2 and SO 2), one should be mindful of the possible introduction of a misconception in this regard.Ĥ.1 The general reaction of non-metals with oxygen (0.5 hours)Ĥ.2 The reaction of carbon with oxygen (1 hour)Ĥ. This is an oxidation reaction, where carbon is oxidized from C(0) to C(+IV). Since both central examples of this chapter result in non-metal dioxides (viz. You may choose to omit these, but they do highlight an important point, namely that not all non-metals form non-metal dioxides when they react with oxygen. Since chemical reactions can seem quite abstract to learners and learning about them in isolation may seem to them as if it lacks relevance, we have also attempted to provide some real-world context to the examples in this chapter.Īt the end of the chapter a few additional non-metals and their reactions with oxygen have been included as enrichment. This means the number of atoms in the reactants at the start of the reaction must equal the number of atoms in the products.
There are no demonstrations prescribed by CAPS for this chapter, but we have included colourful photographs to provide learners with some experience of the splendour of these reactions. S + O2 SO2 Conservation of atoms Atoms cannot be created or destroyed. Once again, the translation between word equation, picture equation and chemical equation is reinforced with exercises and examples. Write a balanced chemical equation based on the following description: the reaction of gaseous CH4 with oxygen gas produces gaseous carbon dioxide and water. Calculate (i) its empirical formula, (ii) molar mass of the gas and (iii) its molecular formula.
A volume of 10.0 L (measured at STP) of this welding gas is found to weigh 11.6 g.
Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. In this chapter learners encounter the reactions of the non-metals, carbon and sulfur with oxygen. A welding fuel gas contains carbon and hydrogen only.
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