Can NiF2 react with K to produce KF and Ni? Why or why not? Question 3 options: A) No, because Ni and K have lower activity than F B) Yes, because K has higher activity than Ni C) Yes, because K has lower activity than Ni D) No, because F and Ni have the same activity

The correct option is;

B) Yes, because K has higher activity than Ni

Explanation:

The chemical equation for the reaction is as follows;

NiF₂ + K → 2KF + Ni

Based on chemical reactivity of the metals nickel and potassium involved in the reaction, we have;

On the activity series, potassium is higher up and therefore more reactive than nickel such that it can displace hydrogen from cold water while hydrogen will be evolved from only an acid in the case of nickel

Hence, the potassium will be able to replace Ni in the NiF₂ compound due to its higher reactivity such that we have;

2k (s) + Ni⁺² (aq) → 2k⁺ + Ni (s)

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.