What is the benefit of writing a net ionic equation instead of a formula equation?

The correct option is The net ionic equation shows the spectator ions in the reaction.

Explanation:

The net ionic reaction will show us the ions which are involved in the reaction. It also helps us the charges present on each atom and how a reaction occurs due to these charges on atoms. It shows us that which ions actually take part in a chemical reaction and which ions do not take part in the reaction and are involved only for balancing the equation.

The net ionic equation shows only the substances that change in the reaction.

Explanation:

The net ionic equation focuses only on the the substances that are really reacting. the net ionic equation does not show the spectator ions. Spectator ions are ions that do not really have a part in the ongoing reaction.

Hence, it can summarily and safely inferred that the advantage of writing the net ionic equations instead of formula equation is that the net ionic equation shows only those species that are directly involved in the reaction.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

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