Chemistry, 15.02.2021 20:30 vlactawhalm29
Titrate 10.00 mL of 0.10 M phosphoric acid with 0.10 M NaOH. Use the burette to dispense the NaOH. Record the pH of the 0.10 M phosphoric acid solution before any titrant is added. In canvas go to the people link, look at the list of people. Count names to see the number of your name in the list, this is X. For example, if you are the fifth person in the list, X for you has a value of 5. For the first increment add a volume of NaOH equal to X*0.03 mL, thereafter add the NaOH in increments of 1.00 mL. After each addition of NaOH, record the pH of the analyte solution and record the volume displayed by the burette(which is the total volume of titrant added thus far). Perform the titration until 40.00 mL of titrant has been added.
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Consider the reduction reactions and their equilibrium constants. cu+(aq)+eββ½βββcu(s)pb2+(aq)+2eββ½βββpb(s)fe3+(aq)+3eββ½βββfe(=6.2Γ108=4.0Γ10β5=9.3Γ10β3 cu + ( aq ) + e β β½ β β β cu ( s ) k =6.2Γ 10 8 pb 2 + ( aq ) +2 e β β½ β β β pb ( s ) k =4.0Γ 10 β 5 fe 3 + ( aq ) +3 e β β½ β β β fe ( s ) k =9.3Γ 10 β 3 arrange these ions from strongest to weakest oxidizing agent.
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Titrate 10.00 mL of 0.10 M phosphoric acid with 0.10 M NaOH. Use the burette to dispense the NaOH. R...
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