83. For each of the following positive ions, use the concept that a chemical com

Question

83. For each of the following positive ions, use the concept that a chemical compound must have a net charge of zero to predict the formula of the simple compounds that the positive ions would form with the Cl-, S2-, and N3 ions. a. K+ b. Mg2+ c. A13+ d. Ca2+ e. Lit 84. For each of the following negative ions, use the concept that a chemical compound must have a net charge of zero to predict the formula of the simple compounds that the negative ions would form with the Cst, Ba2+, and Al3+ ions. 5 d. Se2- Additional Problems

Explanation / Answer

Q83)

Charge on K+ = 1

Charge on Cl- = -1

Hence to balance we need to add 1 atom of K to 1 atom of Cl = 1 - 1 = 0, so the compound formed will be KCl

Charge on Mg(2+) = 2

Charge on Cl- = -1

Hence to balance we need to add 1 atom of Mg to 2 atom of Cl = 2 - 1(2) = 0, so the compound formed will be MgCl2

Complete list of answers is given in the below table, using the above method

Q84)

Charge on Cs+ = 1

Charge on l- = -1

Hence to balance we need to add 1 atom of Cs to 1 atom of l = 1 - 1 = 0, so the compound formed will be CsI

Charge on Ba(2+) = 2

Charge on I- = -1

Hence to balance we need to add 1 atom of Ba to 2 atom of l- = 2 - 1(2) = 0, so the compound formed will be BaI2

Complete list of answers is given in the below table, using the above method

Cl- S(2-) N(3-) K+ KCl K2S K3N Mg(2+) MgCl2 MgS Mg3N2 Al(3+) AlCl3 Al2S3 AlN Ca(2+) CaCl2 CaS Ca3N2 Li(+) LiCl Li2S Li3N

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