In a Ni-Cad cell (battery), which uses solid cadmium and nickel ions,   nickel is oxidized and cadmium is reduced   nickel is reduced and cadmium is oxidized   both nickel and cadmium are oxidized   both nickel and cadmium are reduced

Q: a)Sodium thiosulfate, Na2S2O3, is used as a fixative in photography.  What is the oxidation number…

A: Oxidation state: It describes the extent of oxidation of an atom in a compound . It is an…

Q: What element is oxidized and what is the oxidizing agent in the reaction below? Fe2O3(s) + 3CO(g)…

A: Oxidation reduction reaction (Redox reaction) It can be defined as the chemical reaction in which…

Q: The nickel in a nickel-hydride battery is used as   the salt bridge   the anode   the cathode   a…

A: The nickel-hydride batteries are rechargeable batteries as the reaction occurring is reversible in…

Q: The electrolysis of a concentrated sodium chloride solution would   yield sodium metal   produce…

A: Electrolysis is a process in which electricity is passed through a electrolytic solution through two…

Q: Determine the element which is oxidized, element which is reduced, oxidizing agent, and reducing…

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Q: Write the balanced equation for the reaction betweenhydrogen gas and oxygen gas in a fuel cell.

A: Write the balanced equation for the reaction between hydrogen gas and oxygen gas in a fuel cell.

Q: True/False. The electrical energy is measured as electrons are transferred between the anode and…

A: In a Galvanic cell, electrical energy is generated due to a difference in chemical potential energy…

Q: or the following galvanic elements under standard conditions write the reactions for each half…

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Q: rimarily composed of iron) pipe can be protected from corrosion by attaching to the pipe a strip of…

A: Silver forms an oxide layer around the steel. This can prevent steel from rust.

Q: In an electrochemical cell, energy is converted to energy. O Electrical; Chemical Electrical;…

A: In an electrochemical cell Chemical energy is coverted to Electrical energy

Q: Fuel cells are a particular type of electrochemical cell that require a constant source of chemical…

A: The following reaction takes place at the anode of the alkaline fuel cell: H2 + 2OH-  →  2H2O + 2e-…

Q: The Ni-Cu cell has an observed voltage of +0.60 V under standard conditions, indicating that…

A: A  spontaneous reaction is the one that occurs on its own without needing any external source of…

Q: which of the following is true? reduction occurs at the cathode and oxidation at the cathode,…

A: Statement- Reduction occurs at the cathode and oxidation at the cathode. False Statement- oxidation…

Q: In an electrolytic cell, two inert carbon electrodes were immersed in an aqueous solution of tin…

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Q: What element is oxidized and what is the oxidizing agent in the reaction below? Fe₂O₃(s) + 3CO(g) →…

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Q: 22) Using a galvanic cell consisting of: Zn//Zn² II Cu²/Cu -Draw the cell indicating the cathode and…

A: Dear student since you have posted multiple parts question we will solve the first 2 parts of…

Q: What is produced at the cathode? What is produced at the anode? Pb Cl2 Mg Fe F2 I2 Fe F2 Cl2 Pb O I2…

A: Molten mixture means there is no water vapour

Q: Explain what is cell potential in terms of this formula. E°cell = E°red - E°oxid %3D

A: The electrode which has higher reduction potential acts as a cathode and the electrode with lower…

Q: The lead in a lead-acid battery is used as   a redox reactant   the salt bridge   a place where…

A: Correct answer is : a place where electrons are being stored. Lead is used as anode in the lead-acid…

Q: Which statement best explains the difference between an electrochemical cell and an electrolytic…

A: Electrochemical cell- This cell converts chemical energy to electrical energy.Electrolytic cell-…

Q: A 0.250M solution of Na2C2O4 is to be used in a reaction in which C2O-24 will be oxidized to CO2.…

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Q: cell drops to zero it will indicate that: The concentrations of the products has decreased. The…

A: Cell potential is the potential difference between two half cells of an electrochemical cell or the…

Q: Which statement is not correct? O A voltaic cell is a type of electrochemical cell All…

A: Electrolysis is chemical decomposition of electrolyte in the  aqueous state by the passage of…

Q: The electrolysis of a concentrated sodium chloride solution would produce   sodium metal and…

A: The electrolysis of a concentrated sodium chloride solution would produce sodium metal and chlorine…

Q: If your base metal is Nickel, which among the following metals can act as a sacrificial anode for…

A: The reduction potential of the metals are given below :

Q: Which statement explains why an over-potential must be used in the Chlor-Alkali process? 02 will be…

A: Chlor-Alkaline process is the electrolysis of NaCl solution. As it is an aqueous solution there are…

Q: to wear a nickel-plated copper coin: a) the nickel coin must be cathode b) the cathode must be made…

A: The cathode must be made of copper. B option is correct. Here oxidation of Ni takes place . If it is…

Q: In the silver and copper galvanic cell, what is being reduced and what is being oxidized? A) The…

A: Given : Galvanic cell of silver and copper.

Q: All of the following are rechargeable batteries except for __________ batteries.     nickel-cadmium…

A: Answer :            Correct option is Third option i.e lithium. All of the following are…

Q: Complete and balance the following chemical equation, which occurs in acidic solution: Fe2+ (aq) +…

A: In order to balance the given reaction involves the question, it is quite necessary to determine the…

Q: A galvanic cell is set-up in the laboratory with a copper anode and an unidentified cathode. Your…

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Q: A galvanic cell is set-up in the laboratory with a copper anode and an unidentified cathode. Your…

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Q: Fuel cells produce carbon dioxide and hydrogen. emit sulfur oxides. are environmentally clean.…

A: A fuel cell is electrochemical that converts the chemical energy of a fuel into electricity through…

Q: O An oxidizing agent gains electrons. O An oxidizing agent causes another species to be oxidized. O…

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Q: The decomposition of NaCl(l) into Na(l) and Cl2(g) is thermodynamically unfavorable. The…

A: In this question, we will Identify which statement is flaw in electrolytic cell representation.  How…

Q: Which of the following is true? Oxidation occurs at the cathode and oxidation occurs at the anode.…

A: Oxidation reaction is the reaction in which the specie loses electron. And the reduction reactions…

Q: Which of the following is false for sacrificial anodes? Mercury or indium is added in aluminum…

A: Electrochemistry:

Q: If 25 amp of current is passed through a solution of CaCl2 for 4 minutes in an electrolytic cell,…

A: The cell reaction for given electrolytic cell can be expressed as,                      At cathode :…

Q: What is the mechanism by which the paint protects the surface of the iron from corrosion a) The ink…

A: option (d) is correct. The layer of paint prevents the water and oxygen necessary for rust formation…

Q: 48  of 48 In the reaction below, which substance is being oxidized? Fe2O3 + 3CO -> 2Fe + 3CO2   CO…

A: To know which substance is oxidised and which is reduced, one has to calculate the oxidation number…

Q: Which type of battery has been designed for use in space vehicles?   a. Silver cells b. Lead storage…

A: Fuel cells give electricity with the help of electrochemical reactions.

Q: Which statement best compares a battery and a galvanic cell? A galvanic cell’s source of power is a…

A: Electrochemical cells are used to supply power for working of electric devices. In Electrochemical…

Q: For each reaction, identify the element that gets reduced and the element that gets oxidized. 2 AgCl…

A: Increase in the oxidation number of an element is termed as oxidation and decrease in oxidation…

Q: A half-cell produced by dissolving copper in water produces an electrode potential of +0.32…

A: Electrode potential can be calculated by the Nernst equation,  Copper content in the cell can be…

Q: Which of the following is true? Reduction occurs at the cathode and oxidation occurs at the cathode.…

A: Cathode is negative  electrode which attracts cation and anode is positive electrode which attracts…

Q: A galvanic cell is set-up in the laboratory with a copper anode and an unidentified cathode. Your…

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Q: O3- is an oxidizing agent  that oxidizes :     KI to I2     I2 to I-     S2O3- to I

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Q: What environmental advantage is provided by the use of nickel–metal hydride batteries over…

A: There are different types of batteries such as nickel-cadmium batteries (NiCad), nickel-metal…

Q: Which one of the following items does NOT characterize an oxidizing agent? A An oxidizing agent…

A: The property of an oxidising agent is to oxidise the other species by itself undergoing reduction…

Q: In the electrolysis of molten sodium chloride,   sodium is reduced   sodium is oxidized   sodium is…

A: Electrolysis is the process in which electricity is passed through a solution and bring the chemical…