CHEM 06101 Study Guide - Comprehensive Final Exam Guide - Concentration, Ion, Acid
20 Nov 2018
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Abstract of accurately preparing solutions of known concentration. The purpose of this lab experiment was to prepare different concentration solutions, getting knowledge of using correct equipment to prepare accurate solutions, and learning how to use spectrophotometer to measure the amount of light absorbed by solutions. In this experiment i and my lab partner had prepared different concentration solution from three different known solutions kmno4, k2cro4, and cu(ch3coo)2 h2o. Firstly, we prepared 100 ml of 0. 125m solution using 2. 501g of copper (ii) acetate and then we prepared diluted cu(ch3coo)2 h2o 25 ml of 0. 001m and then using cuvettes and spectrophotometer we found the absorbance of 0. 430. A at a wavelength of 610nm and the percent error is 14. 4%. 0. 002m solution using 10ml of kmno4, and then we prepared 25 ml of 0. 001m kmno4, using. 5ml of 0. 002m kmno4 and the absorbance of this solution was 0. 776 a at a wavelength of. Lastly, we prepared 10 ml of 1. 25x10-3m k2cro4.
