126. Solving a chemistry problem
134. A portion of 0.2058 g of technical NaBr was dissolved in water, 40.00 cm3 of 0.09980N AgNO3 was added to the solution. 21.20 cm3 of KCNS solution was used for titration of excess AgNO3. Calculate the percentage of impurities in the sample if 1.00 cm3 of AgNO3 solution is equivalent to 1.06 cm3 of KCNS solution.
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