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Homework Answers
38) & 39)
40) Painting of metal provides protection by preventing oxygen to come closer to the metal. But paints doesn't last for so long. The process of painting has to be repeated for preventing the metal from corrosion.
Galvanization works differently and it uses Zinc as coating to the metal. When oxygen approaches, it corrodes zinc first. Thus it provides protection to the metal against corrosion. Also it lasts long; as long as any zinc remains intact to the metal, it will keep protecting that.
Therefore, Galvanization provides better protection to metal against corrosion than Painting.
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I need help to understand to
solve these problems in detail.
38. The following figure shows...
11. If the galvanic cell below is constructed with a Pb/Pb2-electrode and a Fe/Fe2+ electrode. determine...
11. If the galvanic cell below is constructed with a Pb/Pb2-electrode and a Fe/Fe2+ electrode. determine which electrode will be the cathode and which electrode will be the anode. Write each half cell reaction and the overall cell reaction. Oxidation: Reduction: Overall: Label the cell below with the following: a. the location of each substance (Pb, Pb2+, Fe, Fe2+) b. the cathode and anode C. the direction of electron flow d. If the salt bridge contains KCI, label the direction...
2. A standard state galvanic cell is constructed using the following half-reactions. Fe3+ (aq) + Fe2(aq)...
2. A standard state galvanic cell is constructed using the following half-reactions. Fe3+ (aq) + Fe2(aq) Fe2(aq) + 2e → Fe(s) a. Fill in the cell diagram. Label the anode, cathode, the reactants and products in each solu direction of electron flow through the wire, and ion flow through the salt bridge. (5 pts) KNO, Salt Bridge (+) electrode (-) electrode b. Calculate the concentration of each ion in the cell at equilibrium. (10 pts)
I need help on 2. Sketch a voltaic cell based on the following reaction. (a) show...
I need help on 2.
Sketch a voltaic cell based on the following reaction. (a) show the direction of electron flow and the direction of ion migration: (b) identify the cathode and anode: (c) state the signs of the cathode and anode: (d) give the overall balanced reaction. (e) Write the half-reactions that occur in the two electrode compartments. (f) Calculate E degree, assume 25 degree C: (g) Write a cell diagram for the cell: (h) Calculate E when [Cr^3+]...
question 16.46 UU 15 - UU UL ut tu uve- 16.46 The half-cells Fe2+ (aq)|Fe(s) and...
question 16.46
UU 15 - UU UL ut tu uve- 16.46 The half-cells Fe2+ (aq)|Fe(s) and O2(g)|H2O (in acid solution) are linked to create a voltaic cell. (a) Write equations for the oxidation and reduction half- reactions and for the overall cell reaction. (b) Which half-reaction occurs in the anode compart- ment and which occurs in the cathode compartment? (c) Complete the following sentences: Electrons in the external circuit flow from the — electrode to the electrode. Negative ions move...
need help figuring out 12 and 13, all of the questions Cher 103A Electrochemistry -- which...
need help figuring out 12 and 13, all of the questions
Cher 103A Electrochemistry -- which of the two diagrams below represents the galvanic cell? The electrolytic cell? How can you tell? Voltmeter Power supply Molten MX D a. For the galvanic cell if the cathode is on the left and the anode is on the right, which direction do the electrons flow? b. For the electrolytic cell in problem 4, where is the cathode, on the left or the...
PART II. Voltaic Cell Design In each of the following two problems, there's a pair of...
PART II. Voltaic Cell Design In each of the following two problems, there's a pair of half-reactions shown in standard reduction form. In each problem, reverse the appropriate half-reaction, and indicate the following at the diagrams: a) voltage displayed by voltmeter (assume standard conditions) b) content of solution in each half-cell c) substance used for each electrode d) which electrode is anode, which is cathode e) which electrode is (+), which is (-) f) direction of electron flow g) direction...
need help with the rest of the table EXPERIMENT 10 DETERMINATION OF THE ELECTROCHEMICAL SERIES PURPOSE...
need help with the rest of the table
EXPERIMENT 10 DETERMINATION OF THE ELECTROCHEMICAL SERIES PURPOSE To determine the standard cell potential values of several electrochemical coll INTRODUCTION The basis for an electrochemical cell is an oxidation reduction Corredor be divided into two half reactions reaction. This reaction can Oxidation half reaction Gloss of electrons) takes place at the anode, which is the positive electrode that the anions migrate to Chence the name anode) Reduction half reaction (gain of electrons)...
i would really appreciate a quick answer please, thank you 11. Label the diagram below ofa...
i
would really appreciate a quick answer please, thank you
11. Label the diagram below ofa galvanic cell for the following reaction: (15 marks). H2(g)+ Cl2(g) -2 H (aq) + 2 Cl-(aq) Write the oxidation and reduction half-cell reactions (4 marks) a. Oxidation Half reaction Reduction Half Reaction b. On the diagram of the galvanic cell, i) Identify the anode and cathode metals, ii) indicate the direction of electron flow through the circuit, ii) Indicate the direction of the anion...
please help with problems #15 and #16! I was not able to crop it if you...
please help with problems #15 and #16!
I was not able to crop it
if you can help with more than that please do! thank you so
much, I’m studying for finals and getting so much anxiety.
I 1. 1.63 V 2. 1.89 V 3. 1.80 V 4. 1.76 V 5. 1.69 V 015 (part 1 of 2) 4.8 points The following two questions refer to this di- agram for a voltaic cell. Neither of the two electrodes are an...
Need help with questions 1-5 D Determine whether each redox reaction occurs spontane- ously in the...
Need help with questions 1-5
D Determine whether each redox reaction occurs spontane- ously in the forward direction. (a) Ca2+(aq) + Zn(s)-Ca(s) + Zr"(al) (b) 2 Ag+(aq) + Ni(s)--2 Ag(s) + N产(aq) (c) Fe(s) +Mn2 (aą)- Fe (aą)Mn(s) (d) 2 Al(s) + 3 Pb2+(aq) → 2 AP"(aq) + 3 Pb(s) Suppose you wanted to cause Pb ions to come out of solu- tion as solid Pb. What metal could you use to accomplish this? Make a sketch of an electrochemical...
11. If the galvanic cell below is constructed with a Pb/Pb2-electrode and a Fe/Fe2+ electrode. determine which electrode will be the cathode and which electrode will be the anode. Write each half cell reaction and the overall cell reaction. Oxidation: Reduction: Overall: Label the cell below with the following: a. the location of each substance (Pb, Pb2+, Fe, Fe2+) b. the cathode and anode C. the direction of electron flow d. If the salt bridge contains KCI, label the direction...
2. A standard state galvanic cell is constructed using the following half-reactions. Fe3+ (aq) + Fe2(aq) Fe2(aq) + 2e → Fe(s) a. Fill in the cell diagram. Label the anode, cathode, the reactants and products in each solu direction of electron flow through the wire, and ion flow through the salt bridge. (5 pts) KNO, Salt Bridge (+) electrode (-) electrode b. Calculate the concentration of each ion in the cell at equilibrium. (10 pts)
I need help on 2.
Sketch a voltaic cell based on the following reaction. (a) show the direction of electron flow and the direction of ion migration: (b) identify the cathode and anode: (c) state the signs of the cathode and anode: (d) give the overall balanced reaction. (e) Write the half-reactions that occur in the two electrode compartments. (f) Calculate E degree, assume 25 degree C: (g) Write a cell diagram for the cell: (h) Calculate E when [Cr^3+]...
question 16.46
UU 15 - UU UL ut tu uve- 16.46 The half-cells Fe2+ (aq)|Fe(s) and O2(g)|H2O (in acid solution) are linked to create a voltaic cell. (a) Write equations for the oxidation and reduction half- reactions and for the overall cell reaction. (b) Which half-reaction occurs in the anode compart- ment and which occurs in the cathode compartment? (c) Complete the following sentences: Electrons in the external circuit flow from the — electrode to the electrode. Negative ions move...
need help figuring out 12 and 13, all of the questions
Cher 103A Electrochemistry -- which of the two diagrams below represents the galvanic cell? The electrolytic cell? How can you tell? Voltmeter Power supply Molten MX D a. For the galvanic cell if the cathode is on the left and the anode is on the right, which direction do the electrons flow? b. For the electrolytic cell in problem 4, where is the cathode, on the left or the...
PART II. Voltaic Cell Design In each of the following two problems, there's a pair of half-reactions shown in standard reduction form. In each problem, reverse the appropriate half-reaction, and indicate the following at the diagrams: a) voltage displayed by voltmeter (assume standard conditions) b) content of solution in each half-cell c) substance used for each electrode d) which electrode is anode, which is cathode e) which electrode is (+), which is (-) f) direction of electron flow g) direction...
need help with the rest of the table
EXPERIMENT 10 DETERMINATION OF THE ELECTROCHEMICAL SERIES PURPOSE To determine the standard cell potential values of several electrochemical coll INTRODUCTION The basis for an electrochemical cell is an oxidation reduction Corredor be divided into two half reactions reaction. This reaction can Oxidation half reaction Gloss of electrons) takes place at the anode, which is the positive electrode that the anions migrate to Chence the name anode) Reduction half reaction (gain of electrons)...
i
would really appreciate a quick answer please, thank you
11. Label the diagram below ofa galvanic cell for the following reaction: (15 marks). H2(g)+ Cl2(g) -2 H (aq) + 2 Cl-(aq) Write the oxidation and reduction half-cell reactions (4 marks) a. Oxidation Half reaction Reduction Half Reaction b. On the diagram of the galvanic cell, i) Identify the anode and cathode metals, ii) indicate the direction of electron flow through the circuit, ii) Indicate the direction of the anion...
please help with problems #15 and #16!
I was not able to crop it
if you can help with more than that please do! thank you so
much, I’m studying for finals and getting so much anxiety.
I 1. 1.63 V 2. 1.89 V 3. 1.80 V 4. 1.76 V 5. 1.69 V 015 (part 1 of 2) 4.8 points The following two questions refer to this di- agram for a voltaic cell. Neither of the two electrodes are an...
Need help with questions 1-5
D Determine whether each redox reaction occurs spontane- ously in the forward direction. (a) Ca2+(aq) + Zn(s)-Ca(s) + Zr"(al) (b) 2 Ag+(aq) + Ni(s)--2 Ag(s) + N产(aq) (c) Fe(s) +Mn2 (aą)- Fe (aą)Mn(s) (d) 2 Al(s) + 3 Pb2+(aq) → 2 AP"(aq) + 3 Pb(s) Suppose you wanted to cause Pb ions to come out of solu- tion as solid Pb. What metal could you use to accomplish this? Make a sketch of an electrochemical...
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