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Question 1: A solution of F– is prepared by dissolving 0.0712 ± 0.0005 g of NaF...

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Chemistry

Question 1: A solution of F– is prepared by dissolving 0.0712 ±0.0005 g of NaF (molecular weight = 41.989 ± 0.001 g/mol) in 164.00± 0.07 mL of water. Calculate the concentration of F– in solutionand its absolute uncertainty.

Question 20. A solution of HNO3 is standardized by reaction withpure sodium carbonate.

A volume of 27.64 ± 0.05 mL of HNO3 solution was required forcomplete reaction with 0.9875 ± 0.0009 g of Na2CO3, (FM 105.988 ±0.001). Find the molarity of the HNO3 and its absoluteuncertainty.

Answer & Explanation Solved by verified expert
3.6 Ratings (516 Votes)
1 The concentration of NaF Mass of NaF X 1000 Molecular weight of NaF X volume of water concentration of NaF 00712 X 1000 41989 X 164 0013 M Now uncertainities in multiplication and division will propagate as relative uncertainity in concentration relative uncertainity in mass2    See Answer
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