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Variable Oxidation States

How will you ...

Question

How will you prepare the following?
Anhydrous iron (II) chloride from iron.

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Solution

$F e + 2 H C l \to F e C l_{2} + H_{2}$
$F e B r_{2}$ & $F e C l_{2}$ can be prepared analogously.
Another method
$2 F e C l_{3} + C_{6} H_{6} C l \to 2 F e C l_{2} + C_{6} H_{4} C l_{2} + H C l$

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Q. How will you prepare the following?
Iron (II) sulphate crystals from iron

Q. Using Sodium hydroxide solution, how would you distinguish : Iron (II) chloride from Iron (III) chloride?

Q. Using sodium hydroxide solution, how will you distinguish:
(a) zinc nitrate solution from calcium nitrate solution?
(b) iron (II) chloride from iron (III) chloride?
(c) lead hydroxide from magnesium hydroxide?

You are provided with the following chemicals :

NaOH, $N a_{2} C O_{3}, H_{2} O, Z n (O H)_{2}, C O_{2}, H C I, F e, H_{2}, S O_{4}, C I_{2}, Z n .$

Using the suitable chemicals from the given list only, state briefly how you would prepare :

(a) iron (III) chloride, (b) sodium sulphate,

(c) sodium zincate, (d) iron (II) sulphate,

(e) sodium chloride ?

Q. Using sodium hydroxide solution, how would you distinguish:
(a) Ammonium sulphate from sodium sulphate.
(b) Zinc nitrate solution from calcium nitrate solution.
(c) Iron (II) chloride from Iron (III) chloride.

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