Calculate the Percentage of MnO2 in a mineralspecimen in the I2 liberated by a 0.1344 g sample in thenet reaction: MnO2(s) +4H+ + 2I- ->Mn2+ + I2 + 2H2O required 32.30mL of 0.07220 MNa2S2O3. I don't understand what the steps of the problem are.

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crimsoncod466Lv1

28 Sep 2019

Calculate the Percentage of MnO₂ in a mineralspecimen in the I₂ liberated by a 0.1344 g sample in thenet reaction:

MnO_2(s) +4H⁺ + 2I^- ->Mn²⁺ + I₂ + 2H₂O

required 32.30mL of 0.07220 MNa₂S₂O_3.

I don't understand what the steps of the problem are.

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28 Sep 2019

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Manganese Dioxide is reduced by iodide ion in acid solution asfollows
MnO2(s)+2 I-(aq)+4H+(aq)->Mn+2(aq)+I2(aq)+2H2O(l)
Determine the electrochemical potential of the reaction at 298Kwhen the initial concentration of the components are [I-]=.215M[H+]=.904M [Mn+2]=.105M and [I2]=1.19*10^-3 M. Half ractionsare

MnO2(s)+4H+(aq)+2e-->Mn+2(aq)+2H2O(l) e red= 1.23V
I2(aq)+2e-->2I-(aq) e red= .5355 V

e cell=?

A 0.6647 g portion of manganese dioxide was added to an acidic solution in which 1.1402 g of a chloride containing sample was dissolved. The following reaction took place:

MnO₂(s) + 2 Cl^- + 4 H⁺ ----> Mn²⁺ + Cl₂(g) + 2 H₂O

When the reaction was complete, the excess MnO₂ was collected by filtration, washed, and weighed. The recovered MnO₂ weighed 0.3521 g. What is the percent Chlorine in the sample?

Potassium permanganate, KMnO4, is a powerful oxidizing agent.The products of a given redox reaction with the permanganate iondepend on the reaction conditions used. In basic solution, thefollowing equation represents the reaction of this ion with asolution containing sodium sulfite:
MnO4- (aq) + I- (aq) ---> MnO2 (s) + I2(aq)

Since this reaction takes place in basic solution, H2O (l) and OH-(aq) will be shown in the reaction. Places for these species areindicated by the blanks in the following restatement of theequation:
MnO4- (aq) + I- (aq) + ___---> MnO2 (s) + I2(aq) + ___

What are the coefficients of the six species in the balancedequation above? Remember to include H2O (l) and H+ (aq) in theappropriate blanks.

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Calculate the Percentage of MnO₂ in a mineralspecimen in the I₂ liberated by a 0.1344 g sample in thenet reaction:

MnO_2(s) +4H⁺ + 2I^- ->Mn²⁺ + I₂ + 2H₂O

required 32.30mL of 0.07220 MNa₂S₂O_3.

I don't understand what the steps of the problem are.

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