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Q. How to Replace Metals from their Salts:
Ans.
If zinc is added to a solution of copper (II) sulfate, it dissolves.
A reddish-brown deposit of metallic copper appears, and the blue solution becomes colorless. The blue Cu2+ ions are replaced by the colorless Zn2+ ions. Zinc is said to replace copper from copper's salt (i.e., copper (II) sulfate ).
Zinc is higher in the activity series than copper. Therefore, the reaction is just as we would expect since a metal higher in the activity series shows a greater readiness to lose electrons and become oxidized.
The above reaction is summarized as follows:
Zn + Cu2+ -> Zn2+ + Cu
Q. For a solution process in which species B is transferred from a gas phase to a liquid solution, find the relation between Δ sol G 0 (solute standard state based on mole fracti
Correct configuration of Fe +3 [26] is: (1) 1s 2 , 2s 2 , 2p 6, 3s 2, 3p 6 , 3d5 (2) 1s 2 , 2s 2, sp 6 , 3s 2 , 3p 6 , 3d 3 , 4s 2 (3) 1s 2 , 2s 2 , 2p
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Describe Hall Effect? Briefly discuss physical origin and uses of Hall Effect? Ans: If a conducting bar is placed in a magnetic field B ⊥ to its axis and if a current flow
Take these values into account and comment on the relation between the heat of formation of the gases and the vibrational frequencies again.
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