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Chapter 4: Q2 E (page 214)

Consider molecular, complete ionic and net ionic equations.

(a) What is the difference between these types of equations?

(b) In what circumstances would the complete ionic and net ionic equations for a reaction be identical?

Short Answer

Expert verified

(a) The molecular equation only represents the formulae of the ionic compounds undergoing reaction, not the ions in a dissolved state.

The complete ionic equation clearly represents all the ions in the dissolved state derived from ionic compounds involved in the reaction.

The net ionic equation represents only those ions which undergo physical or chemical change.

(b) The complete ionic equation and the net ionic equation are identical when all the ions of the ionic compounds have undergone physical or chemical change.

Step by step solution

01

Difference between ionic equations (a)

Molecular equation is a more direct representation of the ionic compounds involved, but the complete ionic equation represents all the ions including the spectator ions (maintaining charge balance) that are not involved in the chemical reaction. The net ionic equation is a short representation of only those ions involved in the physical or chemical changes.

02

Complete and net ionic equations (b)

The complete ionic and net ionic equations are identical when no spectator ions exist. In this case, no ions get cancelled out, making both types of equations identical.

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