MIDTERM 01 - Complexation and Redox Titration Flashcards
Principle - Preparation and standardization of EDTA
Complexation reaction
Titrant - Preparation and standardization of EDTA
EDTA
Analyte - Preparation and standardization of EDTA
Calcium carbonate (CaCO3)
Endpoint - Preparation and standardization of EDTA
Clear blue color
Indicator - Preparation and standardization of EDTA
Eriochrome black TS
Molecular weight of EDTA
292.24 g/mol
Principle - Test for hardness of water
Complexation reaction
Titrant - Test for hardness of water
EDTA
Analyte - Test for hardness of water
Water sample
Indicator - Test for hardness of water
Eriochrome black TS
Endpoint - Test for hardness of water
Clear blue color
Molecular weight of calcium carbonate (CaCO3)
100.0869 g/mol
Principle - Standardization of ceric sulfate solution
Redox reaction
Titrant - standardization of ceric sulfate solution
Ceric sulfate (CeSO4)
Analyte - standardization of ceric sulfate solution
Sodium sulfate (Na2SO4)
Indicator - Standardization of ceric sulfate solution
No indicator
Endpoint - Standardization of ceric sulfate solution
Light yellow color
Provides iron to produce red blood cells
Ferrous sulfate (FeSO4)
Principle - Assay of ferrous sulfate
Redox reaction
Titrant - Assay of ferrous sulfate
Ceric sulfate (CeSO4)
Analyte - Assay of ferrous sulfate
Ferrous sulfate syrup
Indicator - Assay of ferrous sulfate
Orthophenanthroline TS
Endpoint - Assay of ferrous sulfate
Until color change
The analyte (a reducing agent) reacts with iodine to produce iodide (I-)
Iodimetric titration
The analyte (an oxidizing agent) reacts with an unmeasured excess of iodide to produce iodine (I2)
Iodometric titration
Meaning of EDTA
Ethylenediaminetetraacetic acid
Principle - Standardization of iodine solution
Redox-iodimetry
Analyte - Standardization of iodine solution
Standard iodine solution
Titrant - Standardization of iodine solution
Standard sodium thiosulfate solution
Indicator - Standardization of Iodine solution
Starch TS
Endpoint - Standardization of Iodine solution
Disappearance of blue color
Is labelled “for external use only,” used primarily as a disinfectant
Tincture of iodine
Titration that involves the formation of a colored complex that is used to indicate the endpoint of a titration
Complexometric titration/Chelatometry
A Lewis acid that is an electron pair acceptor
Metal
A Lewis base that is an electron pair donor
Ligand
Titration in which the cations are titrated directly with EDTA standard solution using Eriochrome black TS
Direct titration w/ EDTA
Titration in which a known excess of EDTA solution is added to the solution containing the analyte
Indirect titration w/ EDTA
Is based on the concentration of Ca2+ and Mg2+ cations dissolved in water
Hardness of water
Calcium and magnesium form insoluble compounds with carbonated anions cumulatively termed __________
Lime
A strong oxidizing agent that is more stable than permanganate solution
Ceric sulfate
Molecular weight of ceric sulfate
332.24 g/mol
Molecular weight of FeSO4
151.908 g/mol
3 pharmaceutical uses for ferrous sulfate
Hematinic, Anti-anemia, Treatment for iron deficiency anemia
Used as a powerful emetic and was used in the treatment of schistosomiasis and leishmaniasis
Tartar emetic
2 other names of tartar emetic
Antimony potassium tartrate, Potassium antimonyl tartrate
Compound commonly used as a fungicide
Cupric sulfate
4 other names of cupric sulfate
Blue vitriol, Bluestone, Vitriol of copper, Roman vitriol
Compound used as an antidote to cyanide poisoning
Sodium thiosulfate
2 other names of sodium thiosulfate
Sodium hyposulfite, Hypo
Test which involves NaOH+CuSO4 and results to a brick red precipitate
Benedict test
Test with involves CuSO4 and results to a brick red precipitate
Fehling’s Test A
Test which involves potassium sodium tartrate and results to a brick red precipitate
Fehling’s Test B
Principle - Assay of tartar emetic
Redox-iodimetry
Titrant - Assay of tartar emetic
Standard iodine (I2) solution
Analyte - Assay of tartar emetic
Tartar emetic
Indicator - Assay of tartar emetic
Starch TS
Endpoint - Assay of tartar emetic
Blue color
Principle - Assay of cupric sulfate
Redox-iodometry
Titrant - Assay of cupric sulfate
Sodium thiosulfate (Na2S2O3)
Analyte - Assay of cupric sulfate
Cupric sulfate pentahydrate (CuSO4.5H2O)
Indicator - Assay of cupric sulfate
Starch TS
Endpoint - Assay of cupric sulfate
Disappearance of blue color
Molecular weight of ascorbic acid
176.13 g/mol
Also known as vitamin C; is a water soluble vitamin that is an essential antioxidant needed by the body
Ascorbic acid (C6H8O6)
Therapy used for treating mercury and lead poisoning
Chelation therapy