Assignment Chapter 9Concept Explorations9.23. Forming Ionic Compounds? a. Consider a metal...

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Assignment Chapter 9Concept Explorations9.23. Forming Ionic Compounds?  			 				a. Consider a metal atom, which we will give the symbol M. Metal M can readily form the M+ cation. 			 			If the sphere on the left below represents the metal atom M, which of the other three spheres would probably represent the M+ cation? Explain your choice.  			 				b. Consider a nonmetal atom, which we will give the symbol X. The element X is a gas at room temperature and can easily form the X-anion. 			 			If atom X is represented by the sphere on the left below, which of the other three spheres would probably represent the X-anion. Explain your choice.  			 				c. On the basis of the information given previously, write a balanced chemical equation for the reaction that occurs when metal M reacts with nonmetal X. 			 			Include state symbols for the reactants and products. 				d. Is the product of the reaction of M and X a molecule or an ionic compound? Provide justification for your answer.? 				e. Which of the representations below is the most appropriate to describe the compound of M and X, according to your answer for part d? 			 			Explain how you arrived at your choice.9.24. Bond EnergyWhen atoms of the hypothetical element X are placed together, they rapidly undergo reaction to form the X2 molecule: X(g) + X(g)? X2(g)  			 				a. Would you predict that this reaction is exothermic or endothermic? Explain. 			 			  			 				b. Is the bond energy of X2 a positive or a negative quantity? Why? 				c. Suppose ?H for the reaction is -500 kJ/mol. Estimate the bond energy of the X2 molecule. 				d. Another hypothetical molecular compound, Y2(g), has a bond energy of 750 kJ/mol, and the molecular compound XY(g) has a bond energy of 1500 kJ/mol. 			 			Using bond-energy information, calculate ?H for the following reaction:??X2(g) + Y2(g)? 2XY(g)? 				e. Given the following information, as well as the information previously presented, predict whether or not the hypothetical ionic compound AX is likely to form. 			 			In this compound, A forms the A+ cation, and X forms the X-anion. Be sure to justify your answer.Reaction: A(g) + (g) ? AX(s)?The first ionization energy of A(g) is 400 kJ/mol.?The electron affinity of X(g) is -525 kJ/mol.The lattice energy of AX(s) is 100 kJ/mol.? 				f. If you predicted that no ionic compound would form from the reaction in part e, what minimum amount of AX(s) lattice energy might lead to compound formation?

Robert · Accepted Answer

9.23 
a) The smallest of the three, i.e. the last one because of removal of an electron the size gets considerably reduced as number of protons in the nucleus is still the same but the number of electrons are one less. And being a metal we can conclude removal of valence shell electron and outermost shell which leads to considerable reduction in size.
b) Last one. Adding an extra electron causes more negative charge as compared to protons in the nucleus, causing more repulsions and expansion.

Assignment Chapter 9 Concept Explorations 9.23. Forming Ionic Compounds? a. Consider a metal atom, which we will give the symbol M. Metal M can readily form the M + cation. If the sphere on the left...

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