why was water added to a flask during the titration of hydrogen peroxide and thiosulfate
why was water added to a flask during the titration of hydrogen peroxide and thiosulfate
Homework Answers
This is an iodometric titration reaction here where the hydrogen peroxide oxidize the iodide ion to the iodine molecule and detected by starch. Now the water is added here to basically stop the other organic reducing agents to get oxidized in the presence of the H2O2 since H2SO4 is added to the solution to oxidize impure organic moieties and to make a solution for that we use deionized water.
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why was water added to a flask during the titration of hydrogen
peroxide and thiosulfate
The concentration of hydrogen peroxide in a solution is determined by titration with a 0.1258 M...
The concentration of hydrogen peroxide in a solution is determined by titration with a 0.1258 M Ce++ solution. The balanced net ionic equation for the reaction is: 2ce4+ (aq) + H2O2(aq) + 2H20(1)— 2Ce3+ (aq) + O2(g) + 2H30+ (aq) (a) If 18.37 mL of the 0.1258 M Ce4+ solution are needed to react completely with 40.00 mL of the hydrogen peroxide solution, what is the concentration of the hydrogen peroxide solution? M (b) Which of the two solutions was...
____ What was the purpose of hydrogen peroxide and why was it added slowly with cooling?...
____ What was the purpose of hydrogen peroxide and why was it
added slowly with cooling?
HYDROBORATION-OXIDATION OF 1-HEXENE 1. In a screw cap V-vial, prepare a solution of 0.33 g of iodine in 3 mL of dry THF. Firmly tighten the cap; keep the vial closed until ready to use. 2. In a 25 mL round-bottom flask, weigh 0.12 g of sodium borohydride. Add 8 mL of dry THF; stopper the flask with a septum, and stir the mixture...
hydrogen peroxide titration, concentration of KMnO4 is 0.025 and the concentration of H2O2 from the mol...
hydrogen peroxide titration, concentration of KMnO4 is 0.025 and
the concentration of H2O2 from the mol ratio is 0.882 M
o Estimated Concentration of Diluted Peroxide: . Remember when we had a 1:1 ratio we wanted the concentrations of NaOH and HCl to be similar. So if NaOH was 0.025 M then we would want HCl to be 0.025 M. In this case, we have a 5:2 ratio so if the concentration of KMnO4 is approximately 0.025M then we need...
Over time, hydrogen peroxide, H2O2, degrades into water and oxygen gas. A bottle of hydrogen peroxide is...
Over time, hydrogen peroxide, H2O2, degrades into water and oxygen gas. A bottle of hydrogen peroxide is expired and you need to determine the concentration. A titration is performed using the following equation: 3 H2O2(aq) + 2 NaMnO4(aq) → 3 O2(g) + 2 MnO2(aq) + 2 NaOH(aq) + 2 H2O(l) Note that permanganate ion, MnO4-, is purple, while manganese (IV) ion, Mn4+, is colorless. A quantity of 683 mL of 3.44 M NaMnO4 was measured and placed in a beaker. The solution...
Baker’s yeast catalyzes the decomposition of hydrogen peroxide (dihydrogen dioxide) into oxygen and water. Directions: Add 10...
Baker’s yeast catalyzes the decomposition of hydrogen peroxide (dihydrogen dioxide) into oxygen and water. Directions: Add 10 mL of hydrogen peroxide to an Erlenmeyer flask. Add a few grains of yeast and watch the reaction. hydrogen peroxide- H2O2 yeast-? please write the unbalanced and balanced chemical equation
why is yeast the best catalyst for the decimposition of hydrogen peroxide ? Hydrogen Peroxide Only...
why is yeast the best catalyst for the decimposition of
hydrogen peroxide ?
Hydrogen Peroxide Only (Control) No reaction Hydrogen Peroxide + Activated Carbon Slow gas evolution Hydrogen Peroxide + Manganese Dioxide Gas evolution Hydrogen Peroxide + Yeast 0 min Rapid gas evolution 2 min 4 min 6 min No reaction No reaction No reaction No gas evolution No gas evolution No gas evolution
Suppose a student needs to standardize a sodium thiosulfate, Na, S, O3, solution for a titration...
Suppose a student needs to standardize a sodium thiosulfate, Na, S, O3, solution for a titration experiment. To do so, he or she will react it with a solution of iodine. The student adds a 1.00 mL aliquot of 0.0200 M KIO, solution to a flask, followed by 3 mL of distilled water, 0.2 g of solid KI, and 1 mL H, SO . The student then titrates the solution with sodium thiosulfate solution in order to determine the exact...
Suppose a student needs to standardize a sodium thiosulfate, Na, S,Og, solution for a titration experiment....
Suppose a student needs to standardize a sodium thiosulfate, Na, S,Og, solution for a titration experiment. To do so, he or she will react it with a solution of iodine. The student adds a 1.00 mL aliquot of 0.0200 M KIO2 solution to a flask, followed by 3 mL of distilled water, 0.2 g of solid KI, and 1 mL H,SO,. The student then titrates the solution with sodium thiosulfate solution in order to determine the exact concentration of Na,...
Suppose a student needs to standardize a sodium thiosulfate, Na, S,O,, solution for a titration experiment....
Suppose a student needs to standardize a sodium thiosulfate, Na, S,O,, solution for a titration experiment. To do so, he or she will react it with a solution of iodine. The student adds a 1.00 mL aliquot of 0.0200 M KIO, solution to a flask, followed by 3 mL of distilled water, 0.2 g of solid KI, and I mL H, SO. The student then titrates the solution with sodium thiosulfate solution in order to determine the exact concentration of...
5. During the titration of an acid with a base, the sides of the Erlenmeyer flask...
5. During the titration of an acid with a base, the sides of the Erlenmeyer flask are washed with distilled water. Do you think this rinsing will affect the outcome of the titration? Why or why not? 6. The approximate concentration of the NaOH solution you will prepare in Part A of this ex- periment is 0.12 M. Calculate the number of moles and the number of grams of oxalic acid (H,C,0, 2H,O) that will be required to neutralize 25...
The concentration of hydrogen peroxide in a solution is determined by titration with a 0.1258 M Ce++ solution. The balanced net ionic equation for the reaction is: 2ce4+ (aq) + H2O2(aq) + 2H20(1)— 2Ce3+ (aq) + O2(g) + 2H30+ (aq) (a) If 18.37 mL of the 0.1258 M Ce4+ solution are needed to react completely with 40.00 mL of the hydrogen peroxide solution, what is the concentration of the hydrogen peroxide solution? M (b) Which of the two solutions was...
____ What was the purpose of hydrogen peroxide and why was it
added slowly with cooling?
HYDROBORATION-OXIDATION OF 1-HEXENE 1. In a screw cap V-vial, prepare a solution of 0.33 g of iodine in 3 mL of dry THF. Firmly tighten the cap; keep the vial closed until ready to use. 2. In a 25 mL round-bottom flask, weigh 0.12 g of sodium borohydride. Add 8 mL of dry THF; stopper the flask with a septum, and stir the mixture...
hydrogen peroxide titration, concentration of KMnO4 is 0.025 and
the concentration of H2O2 from the mol ratio is 0.882 M
o Estimated Concentration of Diluted Peroxide: . Remember when we had a 1:1 ratio we wanted the concentrations of NaOH and HCl to be similar. So if NaOH was 0.025 M then we would want HCl to be 0.025 M. In this case, we have a 5:2 ratio so if the concentration of KMnO4 is approximately 0.025M then we need...
why is yeast the best catalyst for the decimposition of
hydrogen peroxide ?
Hydrogen Peroxide Only (Control) No reaction Hydrogen Peroxide + Activated Carbon Slow gas evolution Hydrogen Peroxide + Manganese Dioxide Gas evolution Hydrogen Peroxide + Yeast 0 min Rapid gas evolution 2 min 4 min 6 min No reaction No reaction No reaction No gas evolution No gas evolution No gas evolution
Suppose a student needs to standardize a sodium thiosulfate, Na, S, O3, solution for a titration experiment. To do so, he or she will react it with a solution of iodine. The student adds a 1.00 mL aliquot of 0.0200 M KIO, solution to a flask, followed by 3 mL of distilled water, 0.2 g of solid KI, and 1 mL H, SO . The student then titrates the solution with sodium thiosulfate solution in order to determine the exact...
Suppose a student needs to standardize a sodium thiosulfate, Na, S,Og, solution for a titration experiment. To do so, he or she will react it with a solution of iodine. The student adds a 1.00 mL aliquot of 0.0200 M KIO2 solution to a flask, followed by 3 mL of distilled water, 0.2 g of solid KI, and 1 mL H,SO,. The student then titrates the solution with sodium thiosulfate solution in order to determine the exact concentration of Na,...
Suppose a student needs to standardize a sodium thiosulfate, Na, S,O,, solution for a titration experiment. To do so, he or she will react it with a solution of iodine. The student adds a 1.00 mL aliquot of 0.0200 M KIO, solution to a flask, followed by 3 mL of distilled water, 0.2 g of solid KI, and I mL H, SO. The student then titrates the solution with sodium thiosulfate solution in order to determine the exact concentration of...
5. During the titration of an acid with a base, the sides of the Erlenmeyer flask are washed with distilled water. Do you think this rinsing will affect the outcome of the titration? Why or why not? 6. The approximate concentration of the NaOH solution you will prepare in Part A of this ex- periment is 0.12 M. Calculate the number of moles and the number of grams of oxalic acid (H,C,0, 2H,O) that will be required to neutralize 25...
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