Using IUPAC norms write the formulae for the following: (i) Hexaamminecobalt (III) sulphate. (ii) Potassium trioralatochromate (III).

Using IUPAC norms write the formulae for the following: (i) Hexaammine

1.	Using IUPAC norms write the formulae for the following: (i) Hexaamminecobalt (III) sulphate. (ii) Potassium trioralatochromate (III).
Answer» (i) `[Co(NH_(3))_(6)]SO_(4)` (ii) `K_(3)[Cr(C_(2)O_(4))_(3)]`

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
(b) Estimate the minimum potential difference needed to reduce `AI_(2)O_(3)` at `500^(@)C` The gibbs energy change for the decomposition reaction `2/3AI_(2)O_(3)rarr4/3AI+O_(2)`is 960 kJ (F=96500 C `mol^(-1))`

Using IUPAC norms write the formulae for the following: (i) Hexaamminecobalt (III) sulphate. (ii) Potassium trioralatochromate (III).

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