Concept explainers
(a)
Interpretation: Some facts about photography lens are given. The answers are to be stated as per the given conditions.
Concept introduction: Photography lenses contain silver chloride. Silver chloride is light sensitive.
To determine: The explanation for the difference in the fact that, when the light is removed from the decomposition reaction of white silver chloride, the reverse reaction occurs but when pure white silver chloride is exposed to sunlight it darkens and the reverse reaction does not occur in the dark.
(b)
Interpretation: Some facts about photography lens are given. The answers are to be stated as per the given conditions.
Concept introduction: Photography lenses contain silver chloride. Silver chloride is light sensitive.
To determine: An explanation for the reason that, photography lenses do become permanently dark in time.
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Chapter 20 Solutions
Student Solutions Manual for Zumdahl/Zumdahl/DeCoste?s Chemistry, 10th Edition
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- The amount of sodium hypochlorite in a bleach solution can be determined by using a given volume of bleach to oxidize excess iodide ion to iodine; ClO- is reduced to Cl-. The amount of iodine produced by the redox reaction is determined by titration with sodium thiosulfate, Na2S2O3; I2 is reduced to I-. The sodium thiosulfate is oxidized to sodium tetrathionate, Na2S4O6. In this analysis, potassium iodide was added in excess to 5.00 mL of bleach (d=1.00g/cm3) . If 25.00 mL of 0.0700 M Na2S2O3 was required to reduce all the iodine produced by the bleach back to iodide, what is the mass percent of NaClO in the bleach?arrow_forwardWrite balanced chemical equations for the following reactions: (a) cadmium burned in air. (b) elemental cadmium added to a solution of hydrochloric acid. (c) cadmium hydroxide added to a solution of acetic acid, CH3CO2Harrow_forwardWrite the two balanced chemical reactions for: a. Copper (II) oxide reacting with methane under high heat b. Copper (I) oxide reacting with methane under high heatarrow_forward
- Which two sulfides can be dangerous to the human body? A. azurite and cuprite B. hematite and cinnabar C. cinnabar & arsenopyrite D. cinnabun & coffeearrow_forwardLithium reacts violently with water to form aquoeous lithium hydroxide and hydrogen gas. Do you expect lihtium to react with hydrochloric acid? a. Write the balanced chemical equation for this reaction. b. Is lithium more or less reactive than magnesium?arrow_forwardDescribe the Haber process?arrow_forward
- Left figure: Oxygen ions – green spheres, Calcium ions - purple spheres, Titanium ion – tan spheres Right figure: A is calcium (blue), B is titanium (black), and X is oxygen (yellow) A В i. Identify the crystal lattice of the calcium ions." ii. What is the chemical formula for this ionic compound? Explain your reasoning. i. Based on the chemical formula, what is the oxidation state of the titanium ion? Explain your reasoning. iv. Úsing the ABX notation in the figure on the right, provide the general formula for a perovskite.arrow_forwardDescribe the reaction Cu(OH)2 (s) + Heat →arrow_forwardPredict which test tube (A, B, or C) will glow the longest. Briefly explain your reasoning.arrow_forward
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