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First Year First Semester Examination Question Paper

First Year First Semester Examination 

Course:Analytical Chemistry

Institution: Moi University question papers

Exam Year:2013



1. Define the following terms as used in analytical chemistry: Analyte, Sample, Matrix, Reproducibility, Repeatability, Blank and Background. b. Tha following masses were obtained in chemical determination of lead in a sample of water. 50.2, 49.8, 49.9, 48.6 mg. Calculate i. The mean ii. The median iii. The average deviation iv. Relative average deviation v. Average deviation of the mean vi. Standard deviation vii. Coefficient of variation viii. Standard deviation of the mean c. Discuss briefly three main problems associated with trace analysis and how each can be minimized. 2. Expalin giving examples where possible the importance of analytical chemistry in the following areas: i. Medicine ii. Agriculture iii. Environment iv. Geological essays b. The following figures refers to albumin concentration in g/litre in the blood sera of 8 women & 8 men Women: 41, 43, 47, 47, 45, 39, 40, 44 Men: 37, 39, 37, 42, 39, 45, 39, 42 Calculate the standard deviation in the albumin levels in men and women.




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