23. When measuring emission in a flame of standard solutions containing potassium ions. the following results are obtained
С, µg/ml 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
I, c.u. 7.5 15.5 23.0 31.0 38.5 46.0 54.0 61.5 63.0 69.0 74.0 79.0 84.0 89.0
Determine in which concentration range the radiation intensity is proportional to c, and in which it is p-proportional to c1/2.

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