7. Sodium nitrite was assayed by residual titration with 0.1N potassium permanganate and 0.1 N oxalic acid. What is the gram-equivalent weight (gew) of sodium nitrite? (NaNO₂= 68.99g/mol) NaNO₂+ KMnO4+H₂SO4Ⓡ HNO3 + MnSO4 + Na₂SO4 + K₂SO4 + H₂O KMnO4 + H₂C₂O4 + H₂SO4Ⓡ MnSO4 + K₂SO4 + CO₂ + H₂O

7. Sodium nitrite was assayed by residual titration with 0.1N potassium permanganate and 0.1 N oxalic acid. What is the gram-equivalent weight (gew) of sodium nitrite? (NaNO₂= 68.99g/mol) NaNO₂+ KMnO4+H₂SO4Ⓡ HNO3 + MnSO4 + Na₂SO4 + K₂SO4 + H₂O KMnO4 + H₂C₂O4 + H₂SO4Ⓡ MnSO4 + K₂SO4 + CO₂ + H₂O

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter17: Complexation And Precipitation Reactions And Titrations

Section: Chapter Questions

Problem 17.35QAP

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A 0.1064-g of aldrin pesticide sample was decomposed and the liberated chloride was extracted using water. It was titrated with 23.28 mL of 0.03337 M AgNO 3 using a chromate indicator. Express results in % aldrin (C 12H 8Cl 6, MM=365). 63.21 % 22.12 % 17.28 % 44.42 %
7. Sodium nitrite was assayed by residual titration with 0.1N potassium permanganate and 0.1 N oxalic acid. What is the gram-equivalent weight (gew) of sodium nitrite? (NaNO2=68.99g/mol) NaNO2+ KMnO4 +H2SO4 ® HNO3 + MnSO4 + Na2SO4 + K2SO4 + H2O KMnO4 + H2C2O4 + H2SO4 ® MnSO4 + K2SO4 + CO2 + H2O ㅋ
Direct titration: 10.90 ± 0.02 mL of an unknown KHP solution required 11.72 ± 0.02 mL of 0.1090 ± 0.0006 M NaOH to reach the end point. What is the concentration of KHP in the unknown solution reported with absolute uncertainty? If the unknown solution was prepared by dissolving 5.128 g of the unknown KHP (204.22 g/mol) in 100.00 mL of water, what is the weight percent of KHP in the sample?
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