valency of copper

Remember : Atoms with variable valencies have their symbols same but are named differently. Example 1: Copper (Cu) has a variable valency of 1 and 2. It is shown as Cu + and Cu + + . Cu + is read as Cuprous and Cu + + is read as Cupric. Example 2: Ferrous (Fe +..

Here, the electrolyte is AgNO 3 and the electrodes are silver plates. The process of electrolysis is identical to that of CuSO 4 solution, except for one important difference. Copper has valency two, while silver has valency one. The reactions at the electrodes are ..

Boric anhydride reacts with certain metal salts such as, Ni 2 + , Co 2 + , Cr 3 + , Cu 2 + , Mn 2 + etc. to form colored metaborates. The color of the metaborates is used to identify the metallic ion (cation) in the salt. Taking a small quantity of borax on a small loop of platinum wire to p..

The solids whose conductivity lies between metallic conductors and insulators are called semiconductors. The electrical conductivity of semiconductors is due to the presence of impurities and defects. Their conductivity increases with increase in temperature as the defects increase with the increas..

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 of current Electrolysis of ..

The quantity M/p is a constant for a substance and is known as the chemical equivalent E. The E.C.E (Z) of a substance is thus directly proportional to its chemical equivalent (E); this is evident also from the following table. Electrochemical and Chemical Equivalents Substance Electro chemical equ..

Although most metals are usually electropositive in nature and lose electrons in a chemical reaction they do not react with the same vigour or speed. Metals display different reactions towards different substances. The greater the ease with which an element loses its electrons and acquires a posit..