i need to know how the reduction with hydrogen in the presence of a catalyst works.
2006-10-19 15:30:47 · 3 answers · asked by Goldfish 2 in Science & Mathematics ➔ Chemistry
A catalyst simply changes the rate of the reaction, in most cases, it increases the rate.
Elements/substances are reduced when they Gain hydrogen, so whenever a substance reacts with Hydrogen it is being reduced. The opposite would take place if the element is Losing hydrogen (Oxidation).............
2006-10-20 16:05:17 · answer #1 · answered by J D 3 · 0⤊ 0⤋
The catalyst is there to weaken bonds, and to make the reaction more feasible. The hydrogen is really there to give electrons to whatever is being reduced. An example would be:
CuO + H2 ---> Cu + H2O.
The copper ions have taken two electrons, one from each of the two hydrogen atoms in a molecule of H2.
Acid/base reactions, although they seem to involve hydrogen, are not redox (reduction/oxidation).
2006-10-26 06:40:42 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋
Reduction in terms of hydrogen is the a compound gaining hydrogen.
eg. NH3 + H+ -------> NH4+
The ammonia gained an electron and so was reduced to the ammonium ion.
2006-10-19 22:47:14 · answer #3 · answered by Anonymous · 0⤊ 1⤋