1. Potassium permanganate (KMnO4 ) is a commonly used oxidant in many redox titrations. In one such titration, KMnO4 solution in a buret is added to a solution of oxalic acid in the Erlenmeyer flask.
2MnO4−(aq) + 5H2C2O4(aq) + 6H+(aq) → 2Mn2+(aq) + 10 CO2(g) + 8 H2O(l)
Every component except permanganate (purple) is colorless. The end point of the reaction will be signaled by:
a. The first appearance of the purple color in the solution being titrated
b. The disappearance of the purple color in the solution being titrated
c. The disappearance of the purple color of the permanganate in the buret
d. The first appearance of a green color in the permanganate solution in
2. Assuming 25 oC, a basic solution has a:
a. pH less than 7.00
b. [H3O+ ] greater than 1.00 × 10−7 M
c. [H3O+ ] greater than [OH − ]
d. [OH − ] greater than 1.00 × 10−7 M
e. pH equal to 7.00
3. Consider the following reaction at 25 °C;
Cu2+ (aq) + Fe (s) → Cu (s) + Fe2+ (aq); E0cell = 0.78 V (25 °C)
What would be the value of Ecell at 25 °C, if [Fe2+] = 0.40 M and [Cu2+] = 0.040 M.
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1. Potassium permanganate (KMnO4 ) is a commonly used oxidant in many redox titrations. In one...
In this experiment you will use an oxidation - reduction titration to determine the percent of oxalate ion, CO2 in an unknown sample containing oxalate ion. Potassium permanganate (KMnO.) will be titrated against the oxalic acid (C2H:08) as shown by the following oxidation-reduction reaction: +3 +7 5C,044 2MnO4 + 16H* → 10CO, 8H0 + 2Mn2 +4 + + Mno. Mn? is the reduction process C2042 → CO2 is the oxidation process The underlying principle behind a titration is that an...
Help please??! Molarity of KMnO4 is 0.0100 M Determination of oxalate in Kufe.(0,0...0). Name AB A LOCAL Partner's Name MA R ENDALL Total mass of product synthesized in previous experiment (6) 1720 g Molarity of KMnO. (Record from the label on the container) Trial 1 Trial 2 Trial 2 0.105 1. Mass of sample taken for titration (g) 0.11 2. Initial burette reading (ml) 0 Final burette reading (ml) 20 33.4 22.2 4. Volume of KMnO, used (ml) 2.2 5....
BACKGROUND: Synthesis of Potassium Iron (III) Oxalate Hydrate Salt The iron(II) ions from Fe(NH4)2(SO4)2•6H2O will be precipitated as iron(II) oxalate. Fe^2+(aq) + C2O4^2-(aq) --> FeC2O4 (s) The supernatant liquid, containing the ammonium and sulfate ions, as well as excess oxalate ions and oxalic acid will be decanted and discarded. The solid will then be re-dissolved and the iron(II) ions will be oxidized to iron(III) ions by reaction with hydrogen peroxide. 2Fe^2+(aq) + H2O2(aq) --> 2Fe^3+(aq) +2 OH^ - (aq) The...
titration lab report additional images of lab report QUESTIONS 1. A student masse 0878 of an unknown acid follows the titration procedure required to reach the endpoint on a 10.0 ml Calculate the molar mass of the acid. masses out 0.878 of die in 100 ml volume and titration procedure of Partsherds th the average volume of Non to reach the endpoint on 100 ml aliquot of the acid solution is 18.3 m . 2. In the vinegar titrations (Part...