Homework Answers
Answer:
(5) why auxiliary electrode used in CV?
Auxiliary electrode:
The counter electrode ( also known as auxiliary electrode) is an electrode which is used to close the current circuit in the electrochemical cell . It's usually made of an inert material . Eg Pt, Au, graphite, glassy carbon.and usually it doesn't participate in the electrochemical reaction.
Answer for Question no 3:
Irreversible electron transfer:
If the electron transfer rate is slow, extreme electrode potential are need to drive the electron transfer and register current on the potentiostat. This is known as an irreversible electron transfer.
Reversible electron transfer:
Assuming that both the reduced or oxidised forms of the analyte are infinitely stable in solution, a reversible wave arise when the electron transfer rate is very high.
Add Answer to:
please give full on brief answers for the three following questions 3. From the CV, how can you determine whether or not a reaction is electrochemically 4. How can you calculate the formal potenti...
Please try to give the correct answer with the detailed description of how you solved. Thanks....
Please try to give the correct answer with the detailed
description of how you solved. Thanks.
Reference Electrodes The Eº value for the following reaction is 0.446 V relative to the standard hydrogen electrode (SHE): AgzCrO4(s) + 2e + 2Ag(s) + Cro 2(aq) A chemist wishes to determine the concentration of Cro42 electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE; which has a reduction potential of 0.242 V relative to the SHE) and a silver wire...
for the following reaction, how do you find how many electrons transferred? i understand you must...
for
the following reaction, how do you find how many electrons
transferred? i understand you must write out and balance the half
reactions but i am not sure how to do that. thanks
Identify the oxidation numbers for all the elements in the reactants and products for 2 MnO," (aq) + 39- (aq) + 4H2O(1) 3S() + 2 MnO,(s) + 8 OH(aq) Identify the oxidation numbers by dragging the appropriate labels to their respective targets. Reset Help 2 MnO2 (aq)...
Can you please answering those questions from 1 to 6? Calculate the percentage yield of the...
Can you please answering those questions from 1 to 6?
Calculate the percentage yield of the alcohol and submit the ethanol to the instructor in a labeled vial.3 1. Write a balanced equation for the conversion of sucrose into ethanol. 2. By doing some library research, see whether you can find the commercial method or methods used to produce absolute ethanol 3. Why is the air trap necessary in the fermentation? 4. How does acetaldehyde impurity arise in the fermentation?...
Problem 1. (concept question) 1) What is the Nernst equation and how to define for the...
Problem 1. (concept question) 1) What is the Nernst equation and how to define for the electrochemical reaction (aA bBcC dD)? 2) What is Formal potential and why it is useful? 3) What is the Faraday's law and how it is defined (i.e. its relation)? 4) What is the reference electrode and what is it used for? What is the desired characteristic of reference electrode? Show three examples of reference electrode 5) What is the electrochemical double layer and how...
Please I need help with questions number #3 , #4 , and #5 Rate of Reaction...
Please I need help with questions number
#3 , #4
, and #5
Rate of Reaction Prelaboratory Assignment 1. In a graph of the concentration of a reactant vs. time, what parameter gives the rate? 2. Write Beer's Law as an equation. Show how absorbance can be used to monitor concentration. A rate equation could be written as (Ac/At)--k [c]". Define (name) the following as they pertain to the rate equation: a) (Ac/At) b) k c) [c] 4. Assume n...
can anyone please confirm my answers for 5&6? And can you explain how to fill in...
can
anyone please confirm my answers for 5&6? And can you explain
how to fill in the electrons for 7? Please and Thank you.
5. The values of A, for some coordination complexes are given below. (a) [Fe(ox)) --- 14,100 cm-1 (ox-oxalato ligand-----weak ligand] (b) [Fe(CN).-----35,000 cm ©) [Fe(CN)6]* -----33,800 cm (1) Explain reason(s) why A. of complex (a) and (b) are different (ii) Explain reason(s) why 4, of complex (b) and (c) are different 6. Answer the following questions...
Can you please answer all my questions please. I really need the answers to all the...
Can you please answer all my questions please. I
really need the answers to all the questions please
ORC221F/101/3/2019 48. Which of the following statements about benzene is INCORRECT? (1) All twelve atoms do not lie in the same plane (2) All the carbon atoms are sp2 hybridized (3) The C-H bonds are all the same length (4) The electrophilic aromatic substitution reaction is a common reaction type 49. Name the following compound according to the IUPAC nomenclature. (1) N-ethyl-2-bromo-2-methyl-2-pentanamine...
3. Determine the half reactions for the following three calls. Indicate the number of electrons that...
3. Determine the half reactions for the following three calls. Indicate the number of electrons that are transferred in each case. (NOTE: Either include an image or use superscripts and subscripts. Your TAs will not grade this if not formatted properly. 1. ALH (SHE - but lust worry about the formation of H. You can skip the Pt). i. H.JAG iii. Al-Ag" 4. Per mole of the anode (og solid aluminum that is consumed de oxidized) when a voltaic cell...
b) Electrochemistry is the branch of physical chemistry that studies the relationship between electricity, as a...
b) Electrochemistry is the branch of physical chemistry that
studies the relationship between electricity, as a measurable and
quantitative phenomenon, and identifiable chemical change, with
either electricity considered an outcome of a particular chemical
change or vice versa. These reactions involve electric charges
moving between electrodes and an electrolyte (or ionic species in a
solution). Thus electrochemistry deals with the interaction between
electrical energy and chemical change. When a chemical reaction is
caused by an externally supplied current, as in...
1) trans-4- 3) Can you easily make 1-bromopentane as the only product from the reaction of...
1) trans-4- 3) Can you easily make 1-bromopentane as the only product from the reaction of HBr and why? (Explain!) (10 pts.) fane as the only product from the reaction of 1-pentene with (HINT: You may want to draw out a chemical reaction or two.....) Can 1-chlorobutane be easily produced from the reaction of 1-butene with HCl and why? (Explain! (10 pts.) (HINT: You may want to draw out a chemical reaction or two...) 5) We are there multiple organic...
Please try to give the correct answer with the detailed
description of how you solved. Thanks.
Reference Electrodes The Eº value for the following reaction is 0.446 V relative to the standard hydrogen electrode (SHE): AgzCrO4(s) + 2e + 2Ag(s) + Cro 2(aq) A chemist wishes to determine the concentration of Cro42 electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE; which has a reduction potential of 0.242 V relative to the SHE) and a silver wire...
for
the following reaction, how do you find how many electrons
transferred? i understand you must write out and balance the half
reactions but i am not sure how to do that. thanks
Identify the oxidation numbers for all the elements in the reactants and products for 2 MnO," (aq) + 39- (aq) + 4H2O(1) 3S() + 2 MnO,(s) + 8 OH(aq) Identify the oxidation numbers by dragging the appropriate labels to their respective targets. Reset Help 2 MnO2 (aq)...
Can you please answering those questions from 1 to 6?
Calculate the percentage yield of the alcohol and submit the ethanol to the instructor in a labeled vial.3 1. Write a balanced equation for the conversion of sucrose into ethanol. 2. By doing some library research, see whether you can find the commercial method or methods used to produce absolute ethanol 3. Why is the air trap necessary in the fermentation? 4. How does acetaldehyde impurity arise in the fermentation?...
Problem 1. (concept question) 1) What is the Nernst equation and how to define for the electrochemical reaction (aA bBcC dD)? 2) What is Formal potential and why it is useful? 3) What is the Faraday's law and how it is defined (i.e. its relation)? 4) What is the reference electrode and what is it used for? What is the desired characteristic of reference electrode? Show three examples of reference electrode 5) What is the electrochemical double layer and how...
Please I need help with questions number
#3 , #4
, and #5
Rate of Reaction Prelaboratory Assignment 1. In a graph of the concentration of a reactant vs. time, what parameter gives the rate? 2. Write Beer's Law as an equation. Show how absorbance can be used to monitor concentration. A rate equation could be written as (Ac/At)--k [c]". Define (name) the following as they pertain to the rate equation: a) (Ac/At) b) k c) [c] 4. Assume n...
can
anyone please confirm my answers for 5&6? And can you explain
how to fill in the electrons for 7? Please and Thank you.
5. The values of A, for some coordination complexes are given below. (a) [Fe(ox)) --- 14,100 cm-1 (ox-oxalato ligand-----weak ligand] (b) [Fe(CN).-----35,000 cm ©) [Fe(CN)6]* -----33,800 cm (1) Explain reason(s) why A. of complex (a) and (b) are different (ii) Explain reason(s) why 4, of complex (b) and (c) are different 6. Answer the following questions...
Can you please answer all my questions please. I
really need the answers to all the questions please
ORC221F/101/3/2019 48. Which of the following statements about benzene is INCORRECT? (1) All twelve atoms do not lie in the same plane (2) All the carbon atoms are sp2 hybridized (3) The C-H bonds are all the same length (4) The electrophilic aromatic substitution reaction is a common reaction type 49. Name the following compound according to the IUPAC nomenclature. (1) N-ethyl-2-bromo-2-methyl-2-pentanamine...
3. Determine the half reactions for the following three calls. Indicate the number of electrons that are transferred in each case. (NOTE: Either include an image or use superscripts and subscripts. Your TAs will not grade this if not formatted properly. 1. ALH (SHE - but lust worry about the formation of H. You can skip the Pt). i. H.JAG iii. Al-Ag" 4. Per mole of the anode (og solid aluminum that is consumed de oxidized) when a voltaic cell...
b) Electrochemistry is the branch of physical chemistry that
studies the relationship between electricity, as a measurable and
quantitative phenomenon, and identifiable chemical change, with
either electricity considered an outcome of a particular chemical
change or vice versa. These reactions involve electric charges
moving between electrodes and an electrolyte (or ionic species in a
solution). Thus electrochemistry deals with the interaction between
electrical energy and chemical change. When a chemical reaction is
caused by an externally supplied current, as in...
1) trans-4- 3) Can you easily make 1-bromopentane as the only product from the reaction of HBr and why? (Explain!) (10 pts.) fane as the only product from the reaction of 1-pentene with (HINT: You may want to draw out a chemical reaction or two.....) Can 1-chlorobutane be easily produced from the reaction of 1-butene with HCl and why? (Explain! (10 pts.) (HINT: You may want to draw out a chemical reaction or two...) 5) We are there multiple organic...
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