140. Solving a chemistry problem

140. Solving a chemistry problem

IV. Two 100 ml volumetric flasks were charged with V ml of waste water containing copper. The necessary amounts of ammonia and a solution of rubyanic acid were also introduced there. To one of the flasks was added 10.00 ml of a standard CuSO4 solution with a copper titer of 0.0010 g / ml, the contents of both flasks were brought to the mark. After filtration, the solutions were photometric to obtain the optical density values ​​AX and AX CT. Determine the concentration of copper in waste water (g / l) according to the following data
- table 5 (in accordance with the task number).
Table 5

Problem number V, ml AX AX CT
39 10.0 0.2 0.38

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