A written test has been administred to 226 pupils of the fourth form scientific, chemistry-biology option of 11 schools of Bunia town in DR Congo in order to evaluate the level of acquisition of total ionic reactions by the surveyed pupils. The obtained results at the end of these tests have shown that these pupils do not master correctly the notions of total ionic reactions taught to them (38,94 % of success). These pupils are very skillful in the explaination test (60,18 %) rather than in the execution test (13,72 %). In fact, they easily master the concepts to be memorized ; on the other hand, their failures concern the determination of the electronic transfer of ion, ionisation of molecules in the ionic reactions, the complete writing of a chemical equation and to the preparation of a compound considering the chart representing the characters of volatility and insolubility of a compound. The analysis of the variances of the average results of schools do not significantly differ to the threshold of the significance of 5 % (Fobs 0.05 = 0,81 < Ftab 0.05 = 1,87). This shows that the pupils of 4th form scientific, chemistry-biology option of Bunia town in RD Congo have the same level of mastering of the notions of the total ionic reactions.