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Chapter 17: Q40P (page 431)

What is the purpose of the Nafion the membrane in Figure 17-33

Short Answer

Expert verified

The benefits of nafion membrane in given figure has to be given.

Step by step solution

01

Define Nafion membrane

Nafion membrane is made up of co-polymer nafion which consists of tetrafluoroethylene. It is used as a conductor of protons in proton exchange membrane fuel cells. It can be prepared by co-polymerizing tetrafluoroethylene and perfluoro derivatives. The Half reaction is one of oxidation or reduction in the redox reaction. The half-half reaction is given by oxidation state change in reactants or products in the redox reaction.

02

Determine the beneifts of nafion membrane

Given,

  • Nafion membrane has cation exchange membrane which is coated by carbon fiber known as nafion.
  • Cations can easily pass-through membrane because of fixed negative charges.
  • In rat brain nafion membrane is utilized to detect dopamine, a cationic neuro transmitter.
  • Nafion membrane also known as ultra-micro electrodes and its size is .

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Most popular questions from this chapter

17-19. In the Figure, 17-11, 2.00nmol fructose was introduced at the time of the arrow. How many electrons are lost in the oxidation of one molecule of fructose? Compare the theoretical number of coulombs with the observed number of coulombs for complete oxidation of the sample.

Chlorine has been used for decades to disinfect drinking water. An undesirable side effect of this treatment is reaction with organic impurities to create organochlorine compounds, some of which could be toxic. Monitoring total organic halide (designated TOX) is required for many water providers. A standard procedure for TOX is to pass water through activated charcoal, which adsorbs organic compounds. Then the charcoal is combusted to liberate hydrogen halides:

Organichalide(RX)→o2/800°CCO2+H2O+HX

HX is absorbed into aqueous solution and measured by coulometric titration with a silver anode:

X-(aq)+Ag(s)→AgX(s)+e-

When 1.00 L of drinking water was analyzed, a current of 4.23 mA was required for 387 s. A blank prepared by oxidizing charcoal required 6 s at 4.23 mA. Express the TOX of the drinking water as μmol halogen/L. If all halogen is chlorine, express the TOX as μgCI/L.

What cathode potential (versus S.H.E.) is required to reduce 99.99%of cd(II) from a solution containing 0.10Mcd (II) in 1,0M ammonia if there is negligible current? Consider the following reactions and assume that nearly all (II) is in the form Cd(NH3)42+

localid="1663647104121" Cd2++4NH3⇌Cd(NH3)42+β4=3.6×106Cd2++2e-⇌Cd(s)E°=-.402V

Write the chemical reactions that show that 1 mol of I2 is required for 1 mol of H2O in a Karl Fischer titration.

A monolayer (single layer of atoms) of Cuon the (100) crystal face shown in the margin has1.53×1015atoms/cm2=2.54×10-9mol/cm2. What current can deposit one layer of Cuatoms on1cm2in 1 s?
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