reduction of cu ii

In the Daniel cell, the valencies of zinc and copper are the same, i.e., n=2. However, the electrode potential of a cell in which the valencies of the two metals used in the two half cells are not same e.g., The two half-cell reactions are: Two electrons are released by one Cu..

In order to obtain a cell reaction one must know the oxidized and reduced species to determine the cathode and anode in the cell. In a galvanic cell the cathode is the positive electrode while the anode is the negative electrode. When the electrodes of this cell are connected to the voltmeter, rea..

The oxide obtained by calcination or roasting is then reduced by either carbon or hydrogen. Carbon is usually used in the form of coke, or carbon monoxide. Not all metallic oxides can be reduced by carbon or carbon monoxide. Thus, in order to extract metal from its ore the method adopted depends o..

The nitro group can be removed from an aromatic ring via the following steps: i) reduction of nitro group to amine ii) diazotization of amine with HNO 2 iii) reductive removal of the diazonium group using sodium borohydride or hypophosphorus acid/Cu..

This method is employed when leaching method had been used to concentrate the ore. The metals are obtained by reducing their ions in the solution as precipitates by a more electropositive metal. This method is also called as the hydrometallurgy method of reduction. For example, when a he..

If more than one substance is present in an electrolytic cell the substance liberated at the cathode has highest reduction potential and that at the anode will have the lowest reduction potential. Therefore, i) Na + , Ca 2 + and Al 3 + have lower reductio..

>Within the general reactivity or activity series there are some periodic table trends: Down Group 1 (I) the "Alkali Metals" the activity increases Cs > Rb > K > Na > Li. Down Group 2 (II) the activity increases eg Ca > Mg. On the same period, the Group ..

.e., its reaction is fast and more exothermic. This also implies that the reverse reaction becomes more difficult i.e., the more reactive a metal, the more difficult it is to extract from its ore. The metal is also more susceptible to corrosion with oxygen and water. The reactivity series can be es..

If a current I flows through a potential drop V, the energy lost per second by the drifting charges is VI. In a resistor of resistance R, the loss of energy appears as heat. The rate of heat production P is P = VI = I 2 R = V 2 /R and is independent of the direction ..

(Pt), H 2 (g, 1 atm) H + (aq) (1 mol L -1 ) Cu 2+ (ag) (1 mol L -1 ) Cu(s) at 298 K is called the standard electrode potential of cupric ion - copper electrode denotes as The EMF of the cell is:..