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Transcription of this question: Calcium carbide, CaC2, is an ionic solid.(a)(b)(c)Describe the nature of ionic bonding.State the electron configuration of the Ca2* ion.When calcium compounds are introduced into a gas flame a red colour is seen;sodium compounds give a yellow flame. Outline the source of the colours and whythey are different.[2]Suggest two reasons why solid calcium has a greater density than solidpotassium.[2]Outline why solid calcium is a good conductor of electricity.(e) Calcium carbide reacts with water to form ethyne and calcium hydroxide.caC2 (s) + HO (l) C2H2(g) + (aq)Estimate the pH of the resultant solution.

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