Consider the following Redox Reaction: I3- + 2S2O32- --> 3I- + S4O62- Given that it requires...

Question

Question

Consider the following Redox Reaction:

I₃^- + 2S₂O₃^2- --> 3I^- + S₄O₆^2-

Given that it requires 36.40 mL of 0.3300 M S₂O₃^2- solution to titrate I₃^- in a 15.00 mL sample. Calculate the molarity of I₃^- in the aliquot.

Answer 1

Answer #1

Here:

M(S2O32-)=0.3300 M

V(S2O32-)=36.4 mL

V(I3-)=15.0 mL

According to balanced reaction:

1*number of mol of S2O32- =2*number of mol of I3-

1*M(S2O32-)*V(S2O32-) =2*M(I3-)*V(I3-)

1*0.33*36.4 = 2*M(I3-)*15.0

M(I3-) = 0.4004 M

Answer: 0.4004 M

Answer 2

Similar Homework Help Questions

A sample of copper ore with a mass of 0.4225 g was dissolved in acid. A...

A sample of copper ore with a mass of 0.4225 g was dissolved in acid. A solution of potassium iodide was added, which caused the reaction: 2Cu2+(aq) + 5I– (aq) → I3–(aq ) + 2CuI(s) The I3– that formed reacted quantitatively with exactly 29.96 mL of 0.02100 M Na2S2O3 according to the following equation: I3– (aq) + 2S2O32– (aq) → 3I– (aq ) + S4O62–(aq ) What was the percentage by mass of copper in the ore? If the ore...
I have a reaction that has three elementary steps: 3I- +S2O82- ---> I3- + 2 SO42-...

I have a reaction that has three elementary steps: 3I- +S2O82- ---> I3- + 2 SO42- (this is the RLS) I3 + 2 S2O32- ---> 3 I- + S4O62- starch + I3- ---> starch - I3- complex. (color change to indicate rxn is over) In multiple trials I change the concentrations to see its effect on the rate of the rxn. But the reagents I'm using in this rxn are: (1) starch, Na2S2O3 , KI, KNO3 , and (2) (NH4)2S2O8...
Consider this balanced chemical equation: H2O2(?q) + 3I−(?q) + 2H+(?q) → I3−(?q) + 2H2O(?) In the...

Consider this balanced chemical equation: H2O2(?q) + 3I−(?q) + 2H+(?q) → I3−(?q) + 2H2O(?) In the first 10.0 seconds of the reaction, the concentration of I− drops from 1.000 M to 0.868 M. Calculate the average rate of this reaction in this time interval. Determine the rate of change in the concentration of [H+]

2. Given the following redox equation: 5 C2042 (aq) + 2MnO4 (aq) + 16H(aq) - 10...

2. Given the following redox equation: 5 C2042 (aq) + 2MnO4 (aq) + 16H(aq) - 10 CO2(g) + 2 Mn2+ (aq) + 8 H2O(0) If it takes 25.57 mL of 0.1468 M Na2CO,to titrate 35.45 mL of KMnO solution, what is the molarity of KMnO4?
Help with this Thanks Given the following redox equation: 2. 5 CO 10 CO2(g ) +...

Help with this Thanks Given the following redox equation: 2. 5 CO 10 CO2(g ) + 2 Mn2 (ag) + 8 H20(I) (ag)+ 2MnOs (ag) + 16H'(ag) If it takes 25.57 mL of 0.1468 M Na2C20ato titrate 35.45 mL of KMnO4 solution, what is the molarity of KM O4? IHt
6. The ozone content in polluted air can be determined by an iodometric titration. The air...

6. The ozone content in polluted air can be determined by an iodometric titration. The air sample is bubbled through a buffered KI solution at a rate of 2.8 L/min for 1.5 hr. The density of the air sample is 1.17 g/L. The ozone is reduced by the iodide in the solution according to the following reaction. O3 g+3 I- aq+2 H+ aq → O2 g+ I3- aq+H2O l The resulting I3– is titrated with 0.00265 M Na2S2O3 requiring 9.84...

Redox Titration: Post Lab Questions 1. Consider your percent error. Why do you think that the value is high...

Redox Titration: Post Lab Questions 1. Consider your percent error. Why do you think that the value is high or low? Explain what you could have done to reduce your error. 2. Given the following redox equation: (aq) +2MnO (aq) + 16H'(aq)10 CO (e)+ 2 Mn (aq)+8 HiO() 5 C,O If it takes 25.57 mL of 0.1468 M Na;C;Oa to titrate 35.45 mL of KMnO4 solution, what is the molarity of KMnOa?
Redox Titration: Post Lab Questions 1. Consider your percent error. Why do you think that the value is high...

Redox Titration: Post Lab Questions 1. Consider your percent error. Why do you think that the value is high or low? Explain what you could have done to reduce your error. 2. Given the following redox equation: (aq) +2MnO (aq) + 16H'(aq)10 CO (e)+ 2 Mn (aq)+8 HiO() 5 C,O If it takes 25.57 mL of 0.1468 M Na;C;Oa to titrate 35.45 mL of KMnO4 solution, what is the molarity of KMnOa?
Redox Titration: Post Lab Questions 1. Consider your percent error. Why do you think that the value is high...

Redox Titration: Post Lab Questions 1. Consider your percent error. Why do you think that the value is high or low? Explain what you could have done to reduce your error. 2. Given the following redox equation: (aq) +2MnO (aq) + 16H'(aq)10 CO (e)+ 2 Mn (aq)+8 HiO() 5 C,O If it takes 25.57 mL of 0.1468 M Na;C;Oa to titrate 35.45 mL of KMnO4 solution, what is the molarity of KMnOa?

The amount of l_3^-(aq) in a solution can be determined by titraction with a solution containing...

The amount of l_3^-(aq) in a solution can be determined by titraction with a solution containing a known concentration of S_2O_3^2-(aq) (thlosulfate Ion). The determination Is based on the net IonIc equation 2S_2O^2-_3 (aq) + I^-_3(aq) à S_4O^2-_6(aq) + 3I^-(aq) Given that it requires 30.4 ml of 0.470 M Na_2S_2O_3 (aq) to titrate a 20.0-mL sample of I_3^- (aq), calculate the molarity of I_3^-(aq) in the solution. Number M