why organic reducing agents such as tannin give stabler and finer gold sol than inorganic reducing agents

Q: place the following metals from most active to least active. Ag, Cu, Mg, Pb, Zn

A: Question a five metallic element Ag, Cu, Mg, Pb, Zn is given.  We have following metals from most…

Q: Calculate the equilibrium constant for the following reaction at 25°C: Fe2 (aq) + 2Ag(s) Fe(s) 2Ag…

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Q: Balance

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Q: What is the value of the equilibrium constant for the reaction between each pair at 25°C? (a) Ni(s)…

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Q: Which metal is the best reducing agent? a. Mn b. Al c. Ni d. Cr

A: The reducing agents are said to be those substances or compounds which have lower ability to gain…

Q: which of these metals could provide cathodic protection to iron: Al, Cu, Ni, Zn?

A: A galvanic process by which metals corrode is called corrosion of metals. It reduces life time of…

Q: Which would NOT protect iron from corrosion? Electroplating with Zn Attaching to Ni Electroplating…

A: 1) The zinc coating serves as physical protection which prevents rust and corrosion. 2) Nickel…

Q: Which substance is the strongest reducing agent? Which is weakest?

A: In redox reaction, one reactant is reduced and another reactant is oxidized.

Q: 1. Name the products formed in a permanganate titration (FAS Vs KMnO4)? 2. Give reason Why Burning…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: What factors are able to reduce Cu2+ ion to Cu metal?

A: When a metal looses electrons it forms metal ions. When metal ions accept electrons, they form metal…

Q: Give the equation for the reduction half-reaction when Cu reacts with concentrated HNO3

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Q: Explain the role of each of the following in promoting corrosion: moisture, electrolytes, and acids.

A: Rust is a hydrated form of metal whose exact composition depends on the conditions under which it…

Q: 33. Which of the following represent the best design for corrosion protection?

A: We have to select a design to non storage of liquid in pipes or in drainage system. The storage of…

Q: Define the following terms:(i) Limiting molar conductivity (A°m) (ii) Fuel cell

A: Concept introduction: Conductance is reciprocal of resistance. Conductivity of a substance is equal…

Q: How many grams of cobalt may be formed by the passage of 3.71 amps for 2.68 hours through an…

A: According to the Faraday's first law of electrolysis, the amount of chemical change which will take…

Q: 3. Define corrosion current, corrosion product and electrochemical theory of corrosion.

A: Corrosion current is defined as the current produced in electrochemical cell due to occurrence of…

Q: 21. Calculate the standard cell potential for the cell: Cd | Cd2* (1 M) || Cu²2+ (1 M) | Cu * O…

A: A Galvanic cell is made up of an anode and a cathode. Reduction reaction occurs at cathode whereas…

Q: Among these metals, which is considered soft? a. Cu b. Sn c. Au d. Al     Metals are good…

A: A metal can donate electrons from its outermost shell.

Q: How many g of Ag form when 10.0 A are passed through molten AgCl for 35.0 minutes?

A: Given: Time (t)=35 minutes=35×60 s=2100 sCurrent (I)=10.0 A To find: Mass of Ag

Q: 1) Balance the following in acidic solution: (a) H2O2 + Sn²+ + H2O + Sn*+ (b) PŁO2 + Hg → H* + P&+…

A: Given: Some Reactions are given To find: Balance the given Reaction in acidic medium  Solution:…

Q: a) What is the electromotive force at 25° for a cell made up of the following: Zn | Zn"(0.10M) ||…

A: (a)   The value of given temperature in Kelvin is, T(K) = T( C) + 273 T(K) = 25 + 273 T(K) = 298 K.…

Q: 1. a) What is the electromotive force at 25° for a cell made up of the following: Zn | Zn*(0.10M) l|…

A: This cell consists of Zn on the left i.e. Anode  And Cu on the right i.e. Cathode. a) Electromotive…

Q: 19.85 Calculate the cell potential of the following cell at 25°C. Cr(s) Cr **(1.0 x 10 ³ M) | |…

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Q: How many grams of indium may be formed by the passage of 6.73 amps for 2.55 hours through an…

A: Given, Current (I) = 6.73 A Time (t) = 2.55 hours = 2.55 × 60 × 60 s = 9180 s mass (in grams) of…

Q: Determine which metal, Cu or Zn is reacting with the HCl. and write down balanced equations?

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both…

Q: Rank in decreasing strength of Reducing agent:  Au(s),  N2(g) ,Cr(s)

A: A reducing agent reduces the other molecule and itself gets oxidized  an oxidizing agent oxidizes…

Q: Nickel is a transition element that has multiple oxidation states. Using a nickel salt, a current of…

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Q: What is the practical application of electroless plating?

A: ELECTROLESS PLATING: The process of producing coatings from metal ion solutions without using the…

Q: Distinguish between oxidizing andreducing agents.

A: Oxidizing agent = Oxidizing agent are those molecules in which addition of oxygen takes place and…

Q: Which metal is the best reducing agent?  a   Mn b  Al c   Ni d   Cr

A: Reduction may be defined as the process in which addition of hydrogen or an electropositive element…

Q: Given that sodium oxalate is dissolved in a flask and is titrated to its equivalence point with 30…

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Q: Which would NOT protect iron from corrosion? O Covering with paint or oil Attaching to Ni…

A: Corrosion is defined as the process by which refined metals are transformed into more durable…

Q: What is the color of Methyl Orange in Caustic Potash?  a. Red b. Deep Blue c. Faint pink d. Faint…

A: What is the color of Methyl Orange in Caustic Potash?

Q: What is not a contributing factor to the fact that the magnitude of the standard reduction potentia…

A: The standard reduction potential of a species is the ability to get reduced i.e. gain electrons.

Q: Determine whether HI can dissolve  metal sample. If it can, write a balanced chemical reaction…

A: The standard reduction potential determines the direction of a reaction.  The standard reduction…

Q: Define Reduction of RCOCl and RCOOR′ with a Metal HydrideReagent ?

A: To define the reduction of RCOCl and RCOOR’ with a metal hydride reagent.

Q: Balance the following oxidation – reduction reaction using the half – reaction method in acidic…

A: Given reaction is -  I2 + NO3- → IO3-  + NO2  lets see the steps to balance this equation in acidic…

Q: 22. What is electrochemistry? 23. Mention the types of electrochemical cells and tell the…

A: Electrochemistry is the study of production of electricity from energy released during spontaneous…

Q: 18.11 Calculate the standard emf of a cell that uses the Mg/Mg*and Cu/Cư²+ half-cell reactions at…

A: The galvanic cell is the type of electrochemical cell. The electrochemical cell is the one that…

Q: Which metal would be suitable for use as a sacrificial anode for iron? O Au O Mg Cu Pt Sn

A: Sacrificial anode - In this technique, the metal to be protected is made cathode and is connected to…

Q: Determine which species is the strongest reducing agent.

A: Electrochemical series is series of elements arranged in increasing order of reduction potentials.…

Q: If the concentration of Ag+ is 0.0115 M, the concentration of H+ is 0.355 M, and the pressure of H2…

A: Given that,Concentration of Ag+ =0.0115MConcentration of H+ =0.335MPressure of H2 =1.00atm

Q: What is the acid used in common lead-acid batteries that are historically used in automobiles?

A: The acid used in common lead-acid batteries that are historically used in automobiles is to be…

Q: WHAT ARE THE EFFECTS OF EXTERNAL FACTORS ON CORROSION?

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

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: The passivity to corrosion is related to a- repalstion of electrons. b formation of adheive…

A: Passivity refers to a corrosion preventative mechanism whereby an oxidation layer forms a continuous…