Consider a solution which is 0.15 M in HF and 0.10 M in KF. Which response contains all the true statements, and no others?

I. If NaOH is added, potassium ion reacts with hydroxide ion.

II. If a small amount of NaOH is added, the pH increases very slightly.

III. If HNO3 is added, hydrogen ion reacts with fluoride ion.

IV. If more KF is added, the pH decreases.

A. I, III, and IV

B. II and III

C. II and IV

D. III

E. another combination.

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.

output?

explanation:

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.