How many of the following chemical formulas for the following species have an incorrect name listed?...

How many of the following chemical formulas for the following species have an incorrect name listed? chemical formula name [Pt(H2O)4][PtCl6] tetraaquaplatinum(Ⅱ) hexachloroplatinate(Ⅳ) [Cu(NH3)4]Cl2 tetraamminecopper(Ⅱ) chloride [Co(H2O)4(NH3)(OH)]Cl2 amminetetraaquahydroxocobalt(Ⅲ) chloride Na3[RhCl6] sodiumrhodium(Ⅲ) hexachloride

Expert Solution

Correct chemical names are as follows,

1. [Pt(H2O)4][PtCl6]: tetraaquaplatinum(II)hexachloroplatinate

Pt(H2O)4 = tetraaquaplatinum

Aqua ligands (H2O) has no free electrons. But each oxygen atom in water possess one lone pair of electrons, each lone pair from four water molecule will bond with platinum to form a bond. Platinum is a transition state metal and possess outer d orbital. Once ‘d’ orbital can accommodate 10 electron and there are ten electrons in a full "d" subshell, and platinum, a transition metal, has an outer "d" shell. Platinum will have eight electrons from four water ligands. And it needs ten electrons in a full "d" shell so, ten minus eight equals two, so there are two free electrons in the platinum's outer subshell, hence an oxidation number for platinum is of 2 (II).

2. [Cu(NH3)4]Cl2: tetraamminecopper(Ⅱ) chloride

Above name is correct for the given compound. When excess of ammonia is added to copper sulphate pentahydrate (CuSO4.5H2O) solution assumes an intense deep blue color. The reaction between copper sulphate and ammonia can be written as

Cu²⁺ + 6NH₃ à Cu(NH₃)₆²⁺

The product formed in the reaction is call as hexamminecopper(II).

3. [Co(H2O)4(NH3)(OH)]Cl2: amminetetraaquahydroxocobalt(Ⅲ) chloride

Correct name and oxidation state for cobalt is +2.

4. Na3[RhCl6]: sodiumrhodium(Ⅲ) hexachloride; correct name

Rhodium(III) chloride is an inorganic compounds with the formula RhCl3(H2O)n, where n varies from 0 to 3. These are diamagnetic solids having octahedral Rh(III) centres.

queen_honey_blossom answered 3 weeks ago

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