Calculate the standard cell potential of the cell corresponding to the oxidation of oxalic acid, H2C2O4, by
Question:
5H2C2O4(aq) + 2MnO4 (aq) + 6H + (aq) → 10CO2(g) + 2Mn2 + (aq) + 8H2O(l)
See Appendix C for free energies of formation; ∆Gof for H2C2O4(aq) is 698 kJ.
Step by Step Answer:
Write the equation with the appropriate G f beneath ...View the full answer
Related Video
Lemon juice preserves apples by slowing down the oxidation process. Oxidation is a chemical reaction that occurs when oxygen reacts with certain substances, such as apples. When an apple is cut or bitten, oxygen is exposed to the inside of the apple and causes enzymes in the apple to turn brown, which is an indication of oxidation. The browning process is caused by the production of polyphenol oxidase (PPO) enzymes that convert phenolic compounds into quinones, which then polymerize to form the brown pigments. One of the compounds present in lemon juice is ascorbic acid (vitamin C), which is a natural antioxidant. Antioxidants work by neutralizing the free radicals that cause oxidation. When lemon juice is applied to apples, the ascorbic acid in the lemon juice reacts with the PPO enzymes and slows down the browning process. You can do an experiment by cutting apples into small pieces, leaving one apple piece in contact with air and the others covered with lemon juice and compare the browning process. This will help to understand the antioxidation process in fruits.
Students also viewed these Chemical Engineering questions
-
Calculate the standard cell potential of the following cell at 25oC. Cr(s) |Cr3+(aq)||Hg2 2+(aq) |Hg(l)
-
Calculate the standard cell potential of the following cell at 25oC. Sn(s) |Sn2+(aq)|Cu2+(aq) | Cu(s)
-
Calculate the standard cell potential of the lead storage cell whose overall reaction is PbO2(s) + 2HSO4 (aq) + 2H+(aq) + Pb(s) 2PbSO4(s) + 2H2O(l)
-
Q6). Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 95.0 kg, down a 60 slope at constant speed, as shown in Figure 1 below. The coefficient of friction u between the...
-
Discuss what marketers can do to avoid some of the promotional problems discussed in IMC Perspective 16-2. Do you think the problems that KFC experienced with their promotion in China could have been...
-
Hoffmann-La Roche is considering replacing one permeability test equipment with a new model. The old equipment is fully depreciated and would last 3 more years. The new equipment is expected to have...
-
You push a \(30 \mathrm{~kg}\) shopping cart initially at rest (loaded with groceries) with a constant \(12-\mathrm{N}\) force. How far does it travel after pushing it for \(4.5 \mathrm{~s}\) ?
-
The Results of inspection of DNA samples taken over the past 10 days are given below. Sample size is 100. (a) Construct a 3-sigma p-chart using this information. (b) If the number of defectives on...
-
26 The number of protons, neutrons, electrons in some particles are shown in the table below Particle Protons Neutrons electrons P 1 1 2 Q 2 2 2 R 3 4 2 T 4 5 4 Which one of the following particles...
-
The profit generated by the subsidiary in the U.K. is considered as a good source of money to be used to pay for the import of manufacturing equipment from Japan for the electronic component plant in...
-
Give the mathematical relationships between the members of each possible pair of the three quantities Go, Eo cell, and K.
-
Calculate the equilibrium constant K for the following reaction at 25C from standard electrode potentials. Fe3 + (aq) + Cu(s) Fe2+(aq) + Cu2+(aq) The equation is not balanced.
-
Evaluate the expression by hand. Check your result with a calculator. cilm
-
Assume an A/D converter is supplying samples at 44.1 kHz. a. How much time is available per sample for CPU operations? b. If the interrupt handler executes 100 instructions obtaining the sample and...
-
If we want an average memory access time of 6.5 ns, our cache access time is 5 ns, and our main memory access time is 80 ns, what cache hit rate must we achieve?
-
Design logic to interface an I/O device to your microprocessor.
-
Provide a user-level example of a. static power management b. dynamic power management
-
Write the branch tests for each conditional. a. if ((a > 0) && (b < 0)) f1(); b. if ((a == 5) && !c) f2(); c. if ((b jj c) && (a != d)) f3();
-
The crystal structure of KCl is the same as that of NaCl. (a) Calculate the electrostatic potential energy of attraction of KCl, assuming that r 0 is 0.314 nm. (b) Assuming that n = 9 in Equation...
-
In Exercises 15 through 30, find the derivative dy/dx. In some of these problems, you may need to use implicit differentiation or logarithmic differentiation. y ex + et -2x 1 + e
-
The following data have been reported by Shen and Smith for benzene (Bz) adsorption on silica gel [16]: a) Do these data better fit a single site or a dual site Langmuir isotherm? Why? b) Assuming...
-
A boron-doped carbon was prepared by adding 0.1 wt % B to a graphitized carbon black (Monarch 700, Cabot Corp.) and then heat treating this material, designated BC-1, at 2773 K under Ar [71,72]. Its...
-
In a study of iron catalysts, the BET surface areas of a number of materials were determined using N2 or Ar physisorption near 80 K [7173]. The Po values vary slightly because the bath temperature...
-
In relational model, how to distinguish different keys (primary key,superkey, foreign key and so on)?
-
how to transform this from an EERD to a relational model diagram. Attribute_1-1A Attribute_1-1B Attribute_1-1 Attribute_1-1C Attribute_1-2 Entity 1 FK3 (M,M) Attribute_R_1-2-1 Rel_1-2 Attribute_2-1...
-
why is cardinality important to a relational database model? How is it usually defined and what types of GIS analysis operations is it particularly important to? Provide specific examples in your...
Study smarter with the SolutionInn App