1] A student titrates a 20.00 mL sample of a solution of HBr with unknown molarity. The titration requires 20.05 mL of a 0.1819 M solution of NaOH. What is the molarity of the HBr solution? Solution: Final answer:____________ 2] Vinegar can be assayed to determine its acetic acid content. Determine the %(w/v) of acetic acid in a 15.00 mL sample of vinegar that requires 22.70 mL of a 0.5500 M solution of NaOH to reach the equivalence. Solution: Final answer:____________ 3] The calcium in a 5.00-mL serum sample is precipitated as CaC2O4 with ammonium oxalate. The filtered precipitate is dissolved in acid, the solution is heated, and the oxalate is titrated with 0.00100 M KMnO4, requiring 4.94 mL. Calculate the concentration of calcium in the serum in meq/L (equivalents based on charge). Solution: Final answer:____________ 4] Calcium is determined in serum by microtitration with EDTA. A 100-μL sample is treated with two drops of 2 M KOH, Cal-Red indicator is added, and the titration is performed with 0.00122 M EDTA, using a microburet. If 0.203 mL EDTA is required for titration, what is the level of calcium in the serum in mg/dL? Solution: Final answer:____________
1] A student titrates a 20.00 mL sample of a solution of HBr with unknown molarity. The titration requires 20.05 mL of a 0.1819 M solution of NaOH. What is the molarity of the HBr solution?
Solution: Final answer:____________
2] Vinegar can be assayed to determine its acetic acid content. Determine the %(w/v) of acetic acid in a 15.00 mL sample of vinegar that requires 22.70 mL of a 0.5500 M solution of NaOH to reach the equivalence.
Solution: Final answer:____________
3] The calcium in a 5.00-mL serum sample is precipitated as CaC2O4 with ammonium oxalate. The filtered precipitate is dissolved in acid, the solution is heated, and the oxalate is titrated with 0.00100 M KMnO4, requiring 4.94 mL. Calculate the concentration of calcium in the serum in meq/L (equivalents based on charge).
Solution: Final answer:____________
4] Calcium is determined in serum by microtitration with EDTA. A 100-μL sample is treated with two drops of 2 M KOH, Cal-Red indicator is added, and the titration is performed with 0.00122 M EDTA, using a microburet. If 0.203 mL EDTA is required for titration, what is the level of calcium in the serum in mg/dL?
Solution: Final answer:____________
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