How are elements usually found
2 answers:
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Answer:
Hydride ion
Explanation:
You often see the reduction with NADH written as
NADH ⟶ NAD⁺ + H⁺ + 2e⁻
If you think about it, H⁺ + 2e⁻ is equivalent to H:⁻, so we could write the reaction as
NADH ⟶ NAD⁺ + H:⁻
In terms of a mechanism, the dihydropyridine ring of NADH transfers a hydrogen atom with its pair of electrons (a hydride ion) to the substrate and becomes the more stable, aromatic pyridinium ion in NAD⁺.
Answer:
= +ve, reaction is spontaneous
= -ve, reaction is non spontaneous
= 0, reaction is in equilibrium
Case 1: when copper metal is combined with aqueous zinc sulfate.
Here copper is undergoing oxidation ad thus acts as anode and zinc is undergoing reduction , thus acts as cathode.
= standard electrode potential =
Where both are standard reduction potentials.
Thus as is negative , the reaction is non spontaneous.
Case 2: when zinc metal and aqueous copper sulfate solution are combined.
Here zinc is undergoing oxidation ad thus acts as anode and copper is undergoing reduction , thus acts as cathode.
= standard electrode potential =
Where both are standard reduction potentials.
Thus as is positive , the reaction is spontaneous.