Sciences P2 Grade 12 QUESTION 5 Thabang investigates the rate at which reactants are used when a certain amount of calcium carbonate reacts with EXCESS dilute hydrochloric acid, The balanced equation for the reaction is: CaCO3(s) + 2HCl(aq) + CaCl(aq) + H,00) + Co (9) He performs two experiments as illustrated in the diagram below. The beakers are identical and the same volume of acid and mass of calcium carbonate are used in both experiments. Beaker 0,1 mol dm HCl(aq) 0.2 mol dm HCl(aq) Caco, granules х 180.00 180,00 Experiment 1 Experiment 2 5.1 write down the NAME and FUNCTION of the apparatus labelled X. (2)​

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

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