a) under what circumstances is at necessary to use a roman numeral in the name o

Question

a) under what circumstances is at necessary to use a roman numeral in the name or an ionic compound? b) Name two transition metals which don't require a roman numeral to name their ionic compounds. and explain why they don't. (See pages 97-98 in Tro.) 6) Name the following ionic compounds containing transition metals. Remember the rule about roman numerals and transition metals. (See pages 97-98 in Tro a) CuNO2 b) SnCl4 c) Fe203, d) Pb(C2H3O2)2..) e) Ni(Cl03)2 (See about oxyanions on page 100 in Tro.). 7) Write a formula for the following ionic compounds. a) iron (II) phosphate, b) cobalt (II) cyanide, c) manganese (IV) oxide, d) copper (I) hypochlorite (See about oxyanions on page 100 in Tro.).

Explanation / Answer

5.a.It is appropriate to name Compounds with roman numerals when a transition metal say iron has more than one ion ie; FeO is written Iron(II)Oxide because oxygen has a 2- charge and iron therefore has a 2+ charge making it Iron(II) ion. A subscript in any formula stands for the number of atoms/ions the preceding symbol has in the formula so H2O has 2 hydrogen atoms therefore the 2 subscript is after H.

b.zinc and silver

6. a. copper (I) nitrite

b. Tin (IV) chloride

c. Iron (III) chloride

d. Lead (III) Acetate

e. Nickel (III) Chlorate

7.a.Fe3(PO4)2

b. Co(CN)2

c. MnO2

d. CuClO

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