Disccuss what happens to copper in photochromic lenses from a redox perspective.

Expert Solution

Photochromic lenses are a special type of glases which darken when exposed to bright light. These glases reduced the transmitted light. This phonomenon could be explained on the basis of oxidation-reduction reactions. In photochromic lenses, AgCl and CuCl crystals are added during the manufacturing of the glass while it is in the molten state and these crystals become uniformly embedded in the glass as it solidifies. Silver chloride easily undergoes redox reaction as when the light falls on it.

Oxidation half reaction:- Cl- ------> Cl + e-

Reduction half reaction:- Ag+ + e- -----> Ag

Ag atoms formed here makes a cluster and stop the transmitance of light due to which the lances becomes darken.

When the light stops fallen on these glases then Cl reacts with Cu+ and convert it to Cu+2 as follows...

Cl + Cu+ -----> Cu+2 + Cl-

Via this reaction copper stopes the chlorine atoms to escape as gaseous atoms from the matrix of the glass.

This Cu+2 ion react with Ag and oxidized it to its original state.

Cu+2 + Ag ------> Ag+ + Cu+

Lences are again transparent as silver and chlorine atoms get back to their original states.

queen_honey_blossom answered 2 years ago

Redox Reactions 1) What distinguishes a redox reaction from a chemical reaction such as a double...

Redox Reactions 1) What distinguishes a redox reaction from a chemical reaction such as a double replacement? 2) COnsider the following unbalanced net ionic redox equation. VO2++SO32- -> VO++SO42- a) Name the oxidizing agent in this reaction. b) Name the ion that is oxidized in this reaction. c) Balance this net ionic redox equation in acidic solution.

Write the complete redox and the two half-reactions for the reaction of aluminum and copper. Which...

Write the complete redox and the two half-reactions for the reaction of aluminum and copper. Which species is oxidizing agent? The reducing agent? How many electrons were transferred? A compound containing xenon and fluorine, Xex,Fy, was produced by shining bright sunlight on a gaseous mixture of 0.439 g of Xe and excess fluorine. If all the xenon reacts, and 0.693 grams of the compound are formed, what is the empirical formula of the compound? A 0.158 gram sample of a...

. What are some of the problems that could result from wearing contact lenses, and...

. What are some of the problems that could result from wearing contact lenses, and how can they be prevented? Sabrina, who is in her early 30s and having no health complaints, had a regular eye examination with her ophthalmologist. A glaucoma test was not performed. About 6 months later, she was diagnosed with glaucoma and decided to sue the ophthalmology group, saying they were negligent in failing to perform a glaucoma test. What would the defense (the ophthalmology...

What happens to chlorophyll a from the light harvesting complex after absorbing light? What happens to...

What happens to chlorophyll a from the light harvesting complex after absorbing light? What happens to chlorophyll a from the reaction center after absorbing light?

Write the oxidation, reduction, and redox reactions for: a) silver (Ag) reacting with Cu(NO3)2 b) copper...

Write the oxidation, reduction, and redox reactions for: a) silver (Ag) reacting with Cu(NO3)2 b) copper (Cu) reacting with Mg(NO3)2 c) zinc (Zn) reacting with Pb(NO3)2 d) lead (Pb) reacting with AgNO3 e) magnesium (Mg) reacting with NaCl Please show ALL steps. Thank you.

Redox Reactions: Less active metals like copper will reacti with concentrated nitric acid to produce nitric...

Redox Reactions: Less active metals like copper will reacti with concentrated nitric acid to produce nitric oxide gas and the Cu2+(aq) ion at 25C. A) Write balanced chemical equation for this process. 6H+(aq) + 2HNO3(aq) + 3Cu(s) --> 3Cu2+(aq) + 2NO(g) + 4H2O (aq) B) Evaluate change in E for the reaction in (a).

From a finance perspective, what is the primary goal of the corporation?

From a finance perspective, what is the primary goal of the corporation? Minimize financial intermediation None of the options Max out value for the shareholders Minimize the loss of profits and cost Max out profits by fiscal year end

1) What is the consequence of having denser and more spherical lenses (than human eye lenses)....

1) What is the consequence of having denser and more spherical lenses (than human eye lenses). What are the advantages/disadvantages of this? (Hint: fish have them) 2) What is the advantage of being able to move lenses to different distances from the retina? (Hint: fish do this) 3) Many fish have a "tapetum" (a layer of reflective material just behind their retina). How does the tapetum interfere with high-resolution, crisp vision?

4. a. From a business perspective, what is debt and what is equity? What are two...

4. a. From a business perspective, what is debt and what is equity? What are two key differences between debt and equity? During the covid-19 shutdown is it better for me to have a business financed by debt or by equity? Explain your answer. b. For a large publicly traded company, please explain how the firm can get equity financing (one method) and one way that the firm can get debt financing.

From a managerial perspective, what are the advantages and disadvantages of financing obtained from each of...

From a managerial perspective, what are the advantages and disadvantages of financing obtained from each of the following: equity, debt, and intra-corporate sources?

Question