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Q. Illustrate about Werners Theory?
Based on the study of a large number of compounds. Wermer gave the following postulates:
• Metal atoms in complexes possess two types of valences namely. Principal or an auxiliary or secondary.
• Primary valencies are always satisfied by anions but the secondary valencies can be satisfied either by anions and/or neutral molecules.
• Every metal atom has a fixed number of auxiliary valencies.
The secondary valencies show directional properties. In other words secondary valencies are directed in space around the central ion.
Q. Effect of substituting emulsifying agents? i) Make A starch gel with ½ T (tablespoon) of cornstarch add ½ cup of water. Cool the gel. Take 2 T of this gel and add it to th
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What was the color and approximate pH of the cabbage juice indicator solution before any electrolysis was attempted? What was the resulting color and approximate pH of the solution
Properties
Q. What is standard electrode potentials of lanthanides? The standard electrode potentials of lanthanides for the half reaction Ln 3+ (aq) + 3e ----------------> Ln (s)
Write one chemical reaction each to show that (a) Tin (II) chloride is a reducing agent. (b) Chlorine gas can be getting from bleaching powder.
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