9.16 Using IUPAC norms write the formulas for the following:

(i) Tetrahydroxidozincate(II)

(ii) Potassium tetrachloridopalladate(II)

(iii) Diamminedichloridoplatinum(II)

(iv) Potassium tetracyanidonickelate(II)

(v) Pentaamminenitrito-O-cobalt(III)

(vi) Hexaamminecobalt(III) sulphate

(vii) Potassium tri(oxalato)chromate(III)

(viii) Hexaammineplatinum(IV)

(ix) Tetrabromidocuprate(II)

(x) Pentaamminenitrito-N-cobalt(III)

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Vishal Baghel | Contributor-Level 10

4 months ago

(i) Tetrahydroxidozincate (II) = [Zn (OH)₄]^-2

Tetrahydroxi means 4 hydroxide ions with zinc in + 2 oxidation state. Hydroxide ions have a negative charge of -1, so balancing the overall charge of the coordination compound to be zero we get the formula as : [Zn (OH)₄]^-2

(ii) Potassium tetrachloridopalladate (II) = K₃ [PdCl₄].

Tetrachlorido means 3 Chloride ions each having a negative charge. Platinum is in + 2 state. Balance overall charge as 0, no. Of potassium ions are 3. Formula: K₃ [PdCl₄].

(iii) Diamminedichloridoplatinum (II) = [Pt (NH₃)Cl₂]²⁺

Diammine means 2 ammonia molecules, dichlorido means 2 chloride ions, platinum

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(i) Tetrahydroxidozincate (II) = [Zn (OH)₄]^-2

(ii) Potassium tetrachloridopalladate (II) = K₃ [PdCl₄].

Tetrachlorido means 3 Chloride ions each having a negative charge. Platinum is in + 2 state. Balance overall charge as 0, no. Of potassium ions are 3. Formula: K₃ [PdCl₄].

(iii) Diamminedichloridoplatinum (II) = [Pt (NH₃)Cl₂]²⁺

Diammine means 2 ammonia molecules, dichlorido means 2 chloride ions, platinum in + 2 state. Formula: [Pt (NH₃)Cl₂]²⁺

(iv) Potassium tetracyanidonickelate (II) = K₂ [Ni (CN)₄].

tetracyanido means 4 cyanide ions each with a unit negative charge and nickel atom with + 2 state. Formula: K₂ [Ni (CN)₄].

(v) Pentaamminenitrito-O-cobalt (III) = [Co (ONO) (NH₃)₅]⁺²

penataammine means 5 ammonia molecules, nitrito-O means nitrate ion which is bonded to central atom via oxygen and cobalt in + 3 state. Formula: [Co (ONO) (NH₃)₅]⁺²

(vi) Hexaamminecobalt (III) sulphate = [Co (NH₃)₆]₂ (SO₄)₃

Hexaammine means six ammonia molecules and cobalt in + 3 state. Sulphate have a negative charge of-2 Balance overall charge as 0. Formula: [Co (NH₃)₆]₂ (SO₄)₃

(vii) Potassium tri (oxalato)chromate (III) = K₃ [Cr (C₂O₄)₃].

trioxolato means 3 oxolate ions and chromium in + 3 state. Balance overall charge as 0. Formula: K₃ [Cr (C₂O₄)₃].

(viii) Hexaammineplatinum (IV) = [Pt (NH₃)₆]⁴⁺

hexaammine means 6 neutral ammonia molecules and platinum in + 4 state. Balance overall charge as 0. Formula: [Pt (NH₃)₆]⁴⁺

(ix) Tetrabromidocuprate (II) = [Cu (Br)₄]^2-

tetrabromido means 4 bromide ions with a unit negative charge each and copper in + 2 state. Balance overall charge as 0. Formula: [Cu (Br)₄]^2-

(x) Pentaamminenitrito-N-cobalt (III) = [Co (NO₂) (NH₃)₅]²⁺

pentaammine means 5 neutral ammonia molecules, nitrito-N means nitro group bonded to central atom via the lone pair of electron of nitrogen and cobalt in + 3 state. Balance overall charge as 0. Formula: [Co (NO₂) (NH₃)₅]²⁺

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(i) Tetrahydroxidozincate (II) = [Zn (OH)4]-2Tetrahydroxi means 4 hydroxide ions with zinc in + 2 oxidation state. Hydroxide ions have a negative charge of -1, so balancing the overall charge of the coordination compound to be zero we get the formula as : [Zn (OH)4]-2  (ii) Potassium tetrachloridopalladate (II) = K3 [PdCl4].Tetrachlorido means 3 Chloride ions each having a negative charge. Platinum is in + 2 state. Balance overall charge as 0, no. Of potassium ions are 3. Formula: K3 [PdCl4].  (iii) Diamminedichloridoplatinum (II) = [Pt (NH3)Cl2]2+Diammine means 2 ammonia molecules, dichlorido means 2 chloride ions, platinum in + 2 state. Formula: [Pt (NH3)Cl2]2+  (iv) Potassium tetracyanidonickelate (II) = K2 [Ni (CN)4].tetracyanido means 4 cyanide ions each with a unit negative charge and nickel atom with + 2 state. Formula: K2 [Ni (CN)4].  (v) Pentaamminenitrito-O-cobalt (III) = [Co (ONO) (NH3)5]+2penataammine means 5 ammonia molecules, nitrito-O means nitrate ion which is bonded to central atom via oxygen and cobalt in + 3 state. Formula: [Co (ONO) (NH3)5]+2  (vi) Hexaamminecobalt (III) sulphate = [Co (NH3)6]2 (SO4)3Hexaammine means six ammonia molecules and cobalt in + 3 state. Sulphate have a negative charge of-2 Balance overall charge as 0. Formula: [Co (NH3)6]2 (SO4)3  (vii) Potassium tri (oxalato)chromate (III) = K3 [Cr (C2O4)3].trioxolato means 3 oxolate ions and chromium in + 3 state. Balance overall charge as 0. Formula: K3 [Cr (C2O4)3].  (viii) Hexaammineplatinum (IV) = [Pt (NH3)6]4+hexaammine means 6 neutral ammonia molecules and platinum in + 4 state. Balance overall charge as 0. Formula: [Pt (NH3)6]4+  (ix) Tetrabromidocuprate (II) = [Cu (Br)4]2-tetrabromido means 4 bromide ions with a unit negative charge each and copper in + 2 state. Balance overall charge as 0. Formula: [Cu (Br)4]2-  (x) Pentaamminenitrito-N-cobalt (III) = [Co (NO2) (NH3)5]2+pentaammine means 5 neutral ammonia molecules, nitrito-N means nitro group bonded to central atom via the lone pair of electron of nitrogen and cobalt in + 3 state. Balance overall charge as 0. Formula: [Co (NO2) (NH3)5]2+

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