Tutorial queshers set 1| why does molecule become a chiral if has a plane of symmetry even through it has stereocenter

Here's what I get.

Explanation:

Consider the molecule shown below.

It has two chiral centres, labelled R and S, and an internal mirror plane that makes the right and left halves of the molecule mirror images of each other.

If we pass a beam of plane-polarized light through the sample, the R portion of the molecule will rotate the light in a certain direction.

However, the S portion will rotate the light by the same amount in the opposite direction.

The two effects cancel each other, so the molecule has no net effect on plane-polarized light.

Even though the molecule has two chiral centres, it is achiral because it has an internal plane of symmetry.

the answer is c i took the test

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l