Homework Answers
Solution:
Electrolysis is a process in which a chemical change occurs due to passing of electrical current. During the electroplating of copper, the copper ions present in CuSO4 solution deposited on cathode, while O2 gas is liberated at anode.
The overall reaction will be:
2CuSO4 (aq) + 2H2O (l) = 2Cu2+ (aq) + O2(g) + 2H2SO4 (aq)
The half cell reactions occurs at cathode and anode are:
At cathode:
Cu2+ (aq) + 2e = Cu(s)
At anode:
4OH- (aq) = 2H2O(l) + O2 (g)
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what is electrolysis and what is the overall reaction in this
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can someone help me write the half reactions for part A and B. 2. Electrolytic Cells...
can someone help me write the half reactions for part A and
B.
2. Electrolytic Cells A. In a small beaker, mix 1 mL of 0.1 M sodium iodide solution, 9 mL of water, 1 mL of fresh starch solution, and two drops of phenolphthalein indicator. Lead wires from a dry cell or storage battery into this solution and observe the region around each wire (9). Write half- reaction equations for the reactions (10). What would happen if the reaction...
Experiment 9 Part C-Electrolysis of Salt Solutions 10. Obtain and thoroughly rinse a U-shaped glass tube...
Experiment 9 Part C-Electrolysis of Salt Solutions 10. Obtain and thoroughly rinse a U-shaped glass tube (U-tube) and fill it to within an inch or so of the rim with the 2% NaCl solution. 11. Add one drop of phenolphthalein to each arm of the U-tube. Clamp the U-tube to a ring stand (Figure 9-2). 12. Obtain two graphite electrodes and rinse the electrodes thoroughly. Obtain two connector wires with alligator clamps on both ends. With one of the clamps...
What is the reduction half-reaction? In the electrolytic cell of this experiment, copper metal is the...
What is the reduction half-reaction? In the electrolytic cell of this experiment, copper metal is the anode and zinc metal the cathode. The electrolyte solution is sulfuric acid, H2SO4. Oxidation occurs at the copper anode, where Cu is oxidized to Cu^2+: Cu (s) → Cu^2+ (aq) + 2 e– During the experiment, you might have noticed that at the end of the trials, the solution becomes slightly blue, which proves the existence of aqueous Cu^2+. What is the reduction half-reaction...
9. In Part 2 of this experiment, you will observe the reaction of aluminum in an...
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need help with the rest of the table
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5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution...
5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution of NaCl be used instead of NaNO3? 7. What was the purpose of FeSO4 solution in this experiment? 8. Could a solution of FeCl, be used instead of FeSO4? 9. Could a solution of NaSO4 be used instead of FeSO4? 10. Calculate the standard cell potential for the spontaneous redox reaction between a Pb(s)/Pb(NO3)2(aq) half-cell and a Ag(s)/AgNO3(aq) half-cell. Which metal would be oxidized?...
Refer to this table of reduction potentials to answer the questions. Reduction half-reaction Potential (V) +2.87...
Refer to this table of reduction potentials to answer the questions. Reduction half-reaction Potential (V) +2.87 Electrolytic cells use electricity to cause a nonspontaneous redox reaction to occur. An electrolytic cell is constructed using the following components: • a power source, such as a battery, • the substance that will undergo electrolysis, and • two inert electrodes (usually platinum), which serve as the electrical connection between the power source and the substance undergoing electrolysis. As with any cell, oxidation occurs...
Plz Help Me Part 4: Electrolysis Check out a conductivity kit from the stockroom window (includes...
Plz Help Me
Part 4: Electrolysis Check out a conductivity kit from the stockroom window (includes well-plate and well-charged 9V battery). You will make observations on three solutions. Fill the oblong well with distilled water for rinsing the electrodes. First well: Fill the well 2/3 full with 0.1 M Na SO, +one drop of phenolphthalcin. Place the electrodes into the solution. Look carefully around cach cloctrode. You may see the appearance of color or the disappearance of color, as well...
how would you go about solving this problem via using equations just looking for the equation order i should go about solving this problem In this experiment you will be using the two half rea...
how
would you go about solving this problem via using equations
just looking for the equation order i should go about solving this
problem
In this experiment you will be using the two half reactions Cu?"/Cu and Zn2 /Zn. The standard electrode potential, E°, for these half reactions is +0.34V and-0.76V respectively, so the Nernst Equation for these half reactions is the following Cu ea)+2e - Cus) E - 0.34V 0.0592V Cu2+] 0.0592V Zn 2 Note that solids by definition...
Draw a labelled diagram of the apparatus that includes the anode, the cathode, the electrolyte, t...
Draw a labelled diagram of the apparatus that includes the anode, the cathode, the electrolyte, the direction of ion flow and the direction of electron flow provided by the power source. 28. Answer (4 Marks) Cu 29. Write and identify the half-reactions and net reaction. Answer (3 Marks) Cathode Half-Reaction Anode Half-Reaction Net Reaction 30. Calculate the theoretical potential difference of this cell. Answer (2 Mark) Chemistry so Unit C Module 6 S Besides deposition of Cu(s), what other empirical...
can someone help me write the half reactions for part A and
B.
2. Electrolytic Cells A. In a small beaker, mix 1 mL of 0.1 M sodium iodide solution, 9 mL of water, 1 mL of fresh starch solution, and two drops of phenolphthalein indicator. Lead wires from a dry cell or storage battery into this solution and observe the region around each wire (9). Write half- reaction equations for the reactions (10). What would happen if the reaction...
Experiment 9 Part C-Electrolysis of Salt Solutions 10. Obtain and thoroughly rinse a U-shaped glass tube (U-tube) and fill it to within an inch or so of the rim with the 2% NaCl solution. 11. Add one drop of phenolphthalein to each arm of the U-tube. Clamp the U-tube to a ring stand (Figure 9-2). 12. Obtain two graphite electrodes and rinse the electrodes thoroughly. Obtain two connector wires with alligator clamps on both ends. With one of the clamps...
9. In Part 2 of this experiment, you will observe the reaction of aluminum in an aqueous CuCl, solution. a) Given the following half-reactions, predict if aluminum will dissolve in a CuCl, solution. A13+ (aq) + 3e + Al(s) E = - 1.70 V Cu2+ (aq) + 2e - → Cu (s) E = 0.34 V b) The more positive the cell potential the more spontaneous the reaction will be. What precautions should you take in performing this experiment if...
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)...
5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution of NaCl be used instead of NaNO3? 7. What was the purpose of FeSO4 solution in this experiment? 8. Could a solution of FeCl, be used instead of FeSO4? 9. Could a solution of NaSO4 be used instead of FeSO4? 10. Calculate the standard cell potential for the spontaneous redox reaction between a Pb(s)/Pb(NO3)2(aq) half-cell and a Ag(s)/AgNO3(aq) half-cell. Which metal would be oxidized?...
Refer to this table of reduction potentials to answer the questions. Reduction half-reaction Potential (V) +2.87 Electrolytic cells use electricity to cause a nonspontaneous redox reaction to occur. An electrolytic cell is constructed using the following components: • a power source, such as a battery, • the substance that will undergo electrolysis, and • two inert electrodes (usually platinum), which serve as the electrical connection between the power source and the substance undergoing electrolysis. As with any cell, oxidation occurs...
Plz Help Me
Part 4: Electrolysis Check out a conductivity kit from the stockroom window (includes well-plate and well-charged 9V battery). You will make observations on three solutions. Fill the oblong well with distilled water for rinsing the electrodes. First well: Fill the well 2/3 full with 0.1 M Na SO, +one drop of phenolphthalcin. Place the electrodes into the solution. Look carefully around cach cloctrode. You may see the appearance of color or the disappearance of color, as well...
how
would you go about solving this problem via using equations
just looking for the equation order i should go about solving this
problem
In this experiment you will be using the two half reactions Cu?"/Cu and Zn2 /Zn. The standard electrode potential, E°, for these half reactions is +0.34V and-0.76V respectively, so the Nernst Equation for these half reactions is the following Cu ea)+2e - Cus) E - 0.34V 0.0592V Cu2+] 0.0592V Zn 2 Note that solids by definition...
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