(40 points)

it takes 1 minute for a certain amount of potassium phosphate (kh2po4) to dissolve in 100 grams of water at 50 °c.

which of the following will most likely happen if the same sample of potassium phosphate is dissolved in 100 grams of water at 20 °c?
the sample will dissolve in exactly 1 minute.
the sample will dissolve in more than 1 minute.
the collision between particles of the sample will increase.
the collision between particles of the sample will remain constant.

The sample will dissolve in more than 1 minute.

Explanation:

In order to answer this question, we have to consider several significant aspects:

This means that at a lower temperature, the sample will dissolve in a longer period of time.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

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