Question: 19) i What are the basic assumptions of the method of standard additions? ii In what situations is standard additions used? iii What are the

19) i What are the basic assumptions of the method of standard additions? ii In what situations is standard additions used? iii What are the chief drawbacks to using standard additions? iv A 5 ml sample of unknown yields a signal of 4.6 V. 8 ml of 25 ppm standard is added and the signal is 4.6 V. What is the sample concentration? (the D.L. is 1 ppm for this method, no need for confidence interval calculations for this question)

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