42. Решение задачки по химии №122

45. Based on the data in Table 3, write the equations for the precipitation reaction, calculate the volume of precipitant required to carry out quantitative precipitation, and describe the precipitation conditions.
Table 3
Problem No. Substance under study Precipitant

Formula Weight, g Formula Concentration
1 2 3 4 5
45 Pb(NO3)2 0.80 Na2CrO4 0.2 Cн

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