Created by StemPy LabA teacher asks four students for a laboratory route to an alkane. The rule is strict: the alkane named must be the only alkane in the product. The alkyl halides are treated with sodium in dry ether. The sodium salts are either heated with soda lime or electrolysed in water. Which route, with the product the student names, is correct?
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← In Carius method, 0.294 g of an organic compound is heated with fuming nitric acid and silver nitrate, and gives 0.574 g of silver chloride, which is filtered, washed, dried and weighed. Each molecule of the compound has two chlorine atoms. Atomic masses in g mol⁻¹: Cl 35.5, Ag 108. What is the molar mass of the compound?A student writes six statements about halogenation of alkanes. (i) In chlorinating methane, the chain starts when the Cl-Cl bond breaks, not a C-H bond. (ii) Some ethane forms because two methyl radicals join in a termination step. (iii) With excess chlorine, the reaction stops at chloromethane. (iv) Iodination needs an oxidising agent such as HIO₃, as the reaction is reversible. (v) Fluorination is the slowest of the four halogenations. (vi) A primary hydrogen is replaced faster than a tertiary one. How many of the statements above are correct? →
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