8. The conductivity of a saturated solution of BaSO4 at 298 K is found to be 4.20 x 10-6 S cml. The water in the solution has a conductivity of 1.05 x 10-6 S cm-!. The limiting molar conductivity of BaSO4 is 286.5 S cm? mol. What is the molar solubility of BaSO4? [1.1 x 101
Reactive Intermediates
In chemistry, reactive intermediates are termed as short-lived, highly reactive atoms with high energy. They rapidly transform into stable particles during a chemical reaction. In specific cases, by means of matrix isolation and at low-temperature reactive intermediates can be isolated.
Hydride Shift
A hydride shift is a rearrangement of a hydrogen atom in a carbocation that occurs to make the molecule more stable. In organic chemistry, rearrangement of the carbocation is very easily seen. This rearrangement can be because of the movement of a carbocation to attain stability in the compound. Such structural reorganization movement is called a shift within molecules. After the shifting of carbocation over the different carbon then they form structural isomers of the previous existing molecule.
Vinylic Carbocation
A carbocation where the positive charge is on the alkene carbon is known as the vinyl carbocation or vinyl cation. The empirical formula for vinyl cation is C2H3+. In the vinyl carbocation, the positive charge is on the carbon atom with the double bond therefore it is sp hybridized. It is known to be a part of various reactions, for example, electrophilic addition of alkynes and solvolysis as well. It plays the role of a reactive intermediate in these reactions.
Cycloheptatrienyl Cation
It is an aromatic carbocation having a general formula, [C7 H7]+. It is also known as the aromatic tropylium ion. Its name is derived from the molecule tropine, which is a seven membered carbon atom ring. Cycloheptatriene or tropylidene was first synthesized from tropine.
Stability of Vinyl Carbocation
Carbocations are positively charged carbon atoms. It is also known as a carbonium ion.
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8. The conductivity of a saturated solution of BaSO4 at 298 K is found to be 4.20 x 10-6 S
cml. The water in the solution has a conductivity of 1.05 x 10-6 S cm. The limiting
molar conductivity of BaSO4 is 286.5 S cm2 mol-. What is the molar solubility of
BaSO4?
[1.1 x 10-1
9. The conductivity of a 0.01 M aqueous solution of a weak acid HA at 298 K is 5.17 x
10- S cm. At this temperature, the limiting ionic molar conductivities, in S cm? mol-
1 of the H
1
and A ions are 350 and 40, respectively. Calculate the degree of
dissociation and the dissociation constant pf the weak acid.
[0.0133; 1.79 x 10-6]
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