Answer:
One nucleophilic center
Explanation;
Nucleophile:
Nucleophile is a substance which is nucleus loving in nature (<em>Nucleo</em>; Nucleus , <em>phile</em>; Loving). It is known as a specie which donates a lone pair of electrons to electrophile (electron loving) in a chemical reaction.
Thus, Nucleophile is the region of higher electron density in a molecule and attacks on the lower electron density region of another molecule. Also, the nucleophile can also contain a negative charge.
Number of Nucleophilic centers in Methanol:
The chemical structure of Methanol is attached below and it can be observed that the oxygen atom is containing two lone pair of electrons. Hence, the oxygen atom can act as a nucleophilic center. Therefore, there is only one nucleophilic center in methanol.
H₃C-OH + H₃C-Br → H₃C-O-CH₃ + HBr
In above reaction methanol is acting as a nucleophile and is attacking on electrophilic center (Carbon) of methyl bromide yielding dimethyl ether.
<span>
Because of how long it takes to form underground and then it moves to the surface and cools rapidly
</span>
V(NaOH)*M(NaOH)=V(HCOOH)M(HCOOH)
35.43ml*0.1150m=20.00ml*M(HCOOH)
M(HCOOH)=0.2037m
1. To vote
2. To abide by laws
3. To contribute to society positively
4. To be kind to people around you
<span>5. To pass on the top four to your children and neighbors</span>
Answer:
Depending on the
value of
, the cell potential would be:
, using data from this particular question; or- approximately
, using data from the CRC handbooks.
Explanation:
In this galvanic cell, the following two reactions are going on:
- The conversion between
and
ions,
, and - The conversion between
and
ions,
.
Note that the standard reduction potential of
ions to
is higher than that of
ions to
. Alternatively, consider the fact that in the metal activity series, copper is more reactive than silver. Either way, the reaction is this cell will be spontaneous (and will generate a positive EMF) only if
ions are reduced while
is oxidized.
Therefore:
- The reduction reaction at the cathode will be:
. The standard cell potential of this reaction (according to this question) is
. According to the 2012 CRC handbook, that value will be approximately
.
- The oxidation at the anode will be:
. According to this question, this reaction in the opposite direction (
) has an electrode potential of
. When that reaction is inverted, the electrode potential will also be inverted. Therefore,
.
The cell potential is the sum of the electrode potentials at the cathode and at the anode:
.
Using data from the 1985 and 2012 CRC Handbook:
.