In the oxidation pond during microbial leaching of pyrite ores, the redox state of iron changes...
Homework Answers
1) In the oxidation pond during microbial leaching of pyrite ores , the redox state of iron changes from ferric to ferrous and bacteria changes this ferrous to ferric again and thus maintains the oxidation (redox) potential.So , option a is correct.
2) In the precipitation pond during microbial leaching of pyrite ores, the redox state of iron changes from zerovalent iron to ferrous and precipitating copper from cuprous to zerovalent copper.
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In the oxidation pond during microbial leaching of pyrite
ores, the redox state of iron changes...
3. Write the electrochemical half-cell reactions for oxidation and reduction during uniform corrosion in the following:...
3. Write the electrochemical half-cell reactions for oxidation and reduction during uniform corrosion in the following: (Also indicate if corrosion is possible) a. Corrosion of Aluminum in air free sulfuric acid (i.e., No oxygen in the solution) b. Iron in air free acid ferric sulfate solution (assume no O2 in the solution) Hint Fe3+ to Fe reaction is possible due to the presence of the ferric ions c. Carbon steel in aerated seawater (With O2 in the solution) d. Zinc...
18. Which statement about redox reactions is not comect? (a) During oxidation a substance loses electrons...
18. Which statement about redox reactions is not comect? (a) During oxidation a substance loses electrons (b) The oxidation number of an element is zero (c) Oxygen is required for addation (d) Oxidation cannot occur without reduction (e) none of the above 19.11.3 g of acetone. (CH3)2C0.is mibed with 20.7 g of oxygen gas (O) and combusted to form carbon dioxide gas and water vapor. How many grams of CO2 are formed in this process? (a) 25.7 g CO2 (c)...
(1) _ Fe(s) + _ H20(g) Ⓡ_ Fe;0) + H () (B) __CH_(g) + _029) Ⓡ_CO2(g)...
(1) _ Fe(s) + _ H20(g) Ⓡ_ Fe;0) + H () (B) __CH_(g) + _029) Ⓡ_CO2(g) + _H2O(g) (C)_KCIO, (s) ® KCI (s) + 0,(g) __CH4 (1) +_02(g) __CO2(g) + _H,0 (g) (@_CH_03 (1) + ___0,(9) ®__(9) + ___H_0 (1) (1) _NaN; (5) ®___ Na (s) + ___N. (9) (G) C,HN,O, ®_CO + N + H+O+ O, 2. Write and Balance the equations: (A) Aqueous calcium hydroxide reacts with aqueous sodium carbonate to produce solid calcium carbonate and aqueous sodium...
(1x5) marks Iron is an important element, which our body needs for many of its functions....
(1x5) marks Iron is an important element, which our body needs for many of its functions. In our blood, it is the carrier of Oxygen. It is the fourth most common element in the earth's crust. In today's world, iron and its alloys are the most common industrial material due to its low cost and better mechanical properties. The extraction of iron metal takes place from its ore in a number of steps, which are summarized below. Iron ore, coke...
Using the following compound: Na3[Fe(CN)6] Match the correct definition for each term. A. Iron oxidation state...
Using the following compound: Na3[Fe(CN)6] Match the correct definition for each term. A. Iron oxidation state B. Counterion C. Charge from each ligand D. Inner coordination sphere 1. Na+ 2. CN– 3. 3+ 4. 1–
1) Which is NOT characteristic of metabolism during the absorptive state? a) oxidation of about 50%...
1) Which is NOT characteristic of metabolism during the absorptive state? a) oxidation of about 50% of the glucose absorbed from a typical meal b) conversion of glucose to glycogen in hepatocytes c) gluconeogenesis using amino acids d) glucose not picked up by the liver is converted into triglycerides. e) deamination of absorbed amino acids which entered hepatocytes. 2) In the Krebs cycle, an oxidation-reduction reaction is likely coupled with a substrate-level phosphorylation. True or False? 3) Glycolysis is an...
Hi, can anyone please help me with this? i have no clue how to define if...
Hi,
can anyone please help me with this? i have no clue how to define
if a reaction is Oxidation reduction or not. Thanks a lot
OXIDATION-REDUCTION Introduction Chemists refer to reactions which involve a transfer of electrons from one reactant to another as oxidation reduction reactions of just "redox" reactions. Oxidation is defined as a loss of electron and reduction as a gain of electron by a substance during a chemical reaction. The loss of electrons by one substance...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
d. Suppose you mistakenly acidify the filtrate with HCl instead of with HNO3. What would you...
d. Suppose you mistakenly acidify the filtrate with HCl instead of with HNO3. What would you obser after completing the halide test, and what would that observation lead you to conclude? Organic Laboratory Technique Primer Sodium Fusions and lon Testing Background: The elements that commonly occur in organic compounds along with carbon, hydrogen, and oxygen, are: nitrogen sulfur, and the halogens. The detection of these latter three elements depends on converting them into water soluble lons (CNS , and X...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
3. Write the electrochemical half-cell reactions for oxidation and reduction during uniform corrosion in the following: (Also indicate if corrosion is possible) a. Corrosion of Aluminum in air free sulfuric acid (i.e., No oxygen in the solution) b. Iron in air free acid ferric sulfate solution (assume no O2 in the solution) Hint Fe3+ to Fe reaction is possible due to the presence of the ferric ions c. Carbon steel in aerated seawater (With O2 in the solution) d. Zinc...
18. Which statement about redox reactions is not comect? (a) During oxidation a substance loses electrons (b) The oxidation number of an element is zero (c) Oxygen is required for addation (d) Oxidation cannot occur without reduction (e) none of the above 19.11.3 g of acetone. (CH3)2C0.is mibed with 20.7 g of oxygen gas (O) and combusted to form carbon dioxide gas and water vapor. How many grams of CO2 are formed in this process? (a) 25.7 g CO2 (c)...
(1) _ Fe(s) + _ H20(g) Ⓡ_ Fe;0) + H () (B) __CH_(g) + _029) Ⓡ_CO2(g) + _H2O(g) (C)_KCIO, (s) ® KCI (s) + 0,(g) __CH4 (1) +_02(g) __CO2(g) + _H,0 (g) (@_CH_03 (1) + ___0,(9) ®__(9) + ___H_0 (1) (1) _NaN; (5) ®___ Na (s) + ___N. (9) (G) C,HN,O, ®_CO + N + H+O+ O, 2. Write and Balance the equations: (A) Aqueous calcium hydroxide reacts with aqueous sodium carbonate to produce solid calcium carbonate and aqueous sodium...
(1x5) marks Iron is an important element, which our body needs for many of its functions. In our blood, it is the carrier of Oxygen. It is the fourth most common element in the earth's crust. In today's world, iron and its alloys are the most common industrial material due to its low cost and better mechanical properties. The extraction of iron metal takes place from its ore in a number of steps, which are summarized below. Iron ore, coke...
Hi,
can anyone please help me with this? i have no clue how to define
if a reaction is Oxidation reduction or not. Thanks a lot
OXIDATION-REDUCTION Introduction Chemists refer to reactions which involve a transfer of electrons from one reactant to another as oxidation reduction reactions of just "redox" reactions. Oxidation is defined as a loss of electron and reduction as a gain of electron by a substance during a chemical reaction. The loss of electrons by one substance...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
d. Suppose you mistakenly acidify the filtrate with HCl instead of with HNO3. What would you obser after completing the halide test, and what would that observation lead you to conclude? Organic Laboratory Technique Primer Sodium Fusions and lon Testing Background: The elements that commonly occur in organic compounds along with carbon, hydrogen, and oxygen, are: nitrogen sulfur, and the halogens. The detection of these latter three elements depends on converting them into water soluble lons (CNS , and X...
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