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A student wants to calculate the standard cell potential for a galvanic cell that consists of a silver electrode and a copper electrode. The silver electrode has a silver ion concentration of 0.05 M and the copper electrode has a copper ion concentration of 0.1 M. What is the standard cell potential for this cell?

asked Jan 22 in Physical Chemistry by CorrinePerre (2.1k points)

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1 answer 67 views

A student wants to calculate the reaction quotient, Q, for the following chemical reaction at 298 K:2H2(g) + O2(g) ⇌ 2H2O(g)If the partial pressures of H2, O2, and H2O are 0.25 atm, 0.15 atm, and 0.1 atm, respectively, what is the value of Q?

asked Jan 22 in Chemical thermodynamics by LouiePartrid (1.8k points)

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1 answer 10 views

A student wants to calculate the rate of an electrochemical reaction. They know that the concentration of the anodic reactant is 0.01 M and that the cathodic reactant is at a concentration of 0.02 M. The student also knows that the cell potential is 1.23 V, and that the Faraday's constant is 96485 C/mol. The reaction is:Fe(s) + Cu2+(aq) → Fe2+(aq) + Cu(s)What is the rate of the reaction in mol/s at standard conditions (25°C and 1 atm)?

asked Jan 22 in ElectroChemistry by LeannaDoming (1.7k points)

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1 answer 64 views

A student wants to calculate the efficiency of an electrochemical cell with a standard potential of -0.74 volts. The cell is set up with a copper electrode immersed in a solution of copper(II) sulfate and a silver electrode immersed in a solution of silver nitrate, connected by a salt bridge. The student measures a current of 0.5 amperes flowing through the cell for a duration of 60 minutes. Calculate the efficiency of the electrochemical cell in terms of the amount of reactants consumed and the amount of product formed.

asked Jan 22 in ElectroChemistry by DannielleEdd (1.8k points)

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1 answer 10 views

A student wants to calculate the corrosion rate of a zinc electrode in contact with a copper electrode, with a measured current of 0.5 amperes and a surface area of 2 cm². Given that the standard reduction potentials for copper and zinc electrodes are +0.34 V and -0.76 V, respectively, what is the corrosion rate of the zinc electrode in millimeters per year? (Assume a density of 7.14 g/cm³ for zinc and a Faraday constant of 96,500 coulombs per mole).

asked Jan 22 in ElectroChemistry by MerissaGxv8 (1.7k points)

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1 answer 60 views

A student wants to calculate the amount of copper deposited on the cathode during the electrolysis of a copper (II) sulfate solution. If 2.5 A of current is passed through the cell for 10 minutes, what is the mass of copper that is deposited on the cathode? (Assume the atomic weight of copper is 63.55 g/mol and the Faraday constant is 96,485 C/mol).

asked Jan 22 in ElectroChemistry by CaitlynTulab (1.2k points)

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1 answer 11 views

A student wants to analyze the composition of a sample of an unknown metal alloy. They dissolve a 0.500g sample of the alloy in hydrochloric acid to form a solution which is then titrated with sodium hydroxide (NaOH) to neutralize the acid. The volume of the NaOH solution required is 16.50 mL. Assuming the acid reacts with the metal in the alloy according to the formula: M + 2HCl → MCl₂ + H₂, what is the percent composition by mass of Metal M in the alloy?

asked Jan 22 in Analytical Chemistry by Marilynn3793 (2.1k points)

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1 answer 50 views

A student wanted to determine the Faraday constant using the electrolysis of silver nitrate solution. If a current of 2.5 amperes flowed through the solution for 2 hours and 30 minutes, and 0.508 grams of silver were deposited on the cathode, what is the value of the Faraday constant?

asked Jan 22 in ElectroChemistry by AbbieGladden (2.1k points)

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1 answer 69 views

A student synthesized two coordination compounds containing the same metal ion, ligands, and donor atoms. However, the student found that the two compounds exhibited different physical and chemical properties. Explain the possible types of isomerism that could exist in these coordination compounds and how they can be distinguished.

asked Jan 22 in Coordination Chemistry by EllisDonahue (2.6k points)

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1 answer 31 views

A student synthesized a new compound by reacting magnesium with oxygen. The mass of magnesium used in the reaction was 0.25 grams and the mass of the resulting compound was 0.73 grams. Determine the empirical formula of the compound.

asked Jan 22 in Inorganic Chemistry by PrincessDial (2.0k points)

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1 answer 55 views

A student sets up an electrochemical cell with two copper electrodes and a copper(II) sulfate solution. The concentration of the copper(II) sulfate solution is 0.1 M. The student measures the potential difference between the electrodes as 0.54 V. Calculate the resistance of the cell in ohms.

asked Jan 22 in ElectroChemistry by LeathaOchoa (1.7k points)

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1 answer 90 views

A student received a sample of an unknown substance weighing 5 grams. After performing a series of measurements, they found that the sample contained 2.5 grams of pure calcium carbonate and an unknown amount of impurities. Using mass balance calculations, determine the weight and composition of the impurities in the sample.

asked Jan 22 in Analytical Chemistry by jozzaumnvuiyulg (2.5k points)

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1 answer 61 views

A student reacted 10.0 grams of NaOH with 12.0 grams of HCl to produce NaCl and H2O. The balanced chemical equation for the reaction is as follows:NaOH + HCl → NaCl + H2OIf the expected yield of NaCl is 9.0 grams, what is the percent yield of the reaction?

asked Jan 22 in Chemical reactions by KaraTva8370 (2.3k points)

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1 answer 127 views

A student prepares a solution of 0.1 M acetic acid and 0.1 M sodium acetate in a 500 mL volumetric flask. If the pH of the solution is initially 4.7, what will be the new pH of the solution after adding 0.01 mol of hydrochloric acid?

asked Jan 22 in Chemical equilibrium by ValentinStec (1.9k points)

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1 answer 86 views

A student prepares a coordination compound [CoBr(NH3)5]SO4 by reacting cobalt(II) sulfate with ammonium bromide and ammonia. However, the student finds that there are two possible products formed in the reaction. Explain the type of isomerism present in the coordination compound and identify the two isomers formed by the student.

asked Jan 22 in Coordination Chemistry by PartheniaBar (2.2k points)

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1 answer 74 views

A student prepared a 0.2 M solution of sodium acetate and the equilibrium reaction for sodium acetate is CH3COO- + H2O ⇌ CH3COOH + OH-. The initial pH of the solution is 9. Calculate the new pH of the solution when 0.1 mol of NaOH is added to it.

asked Jan 22 in Chemical equilibrium by RandolphNola (1.8k points)

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1 answer 56 views

A student performs a chemical reaction in which the theoretical yield of a particular product is 25 grams. After carrying out the reaction, the student recovers only 18 grams of the product. What is the percent yield of the reaction?

asked Jan 22 in Chemical reactions by Melanie86K41 (1.7k points)

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1 answer 70 views

A student performs a chemical reaction between 12.5 grams of magnesium and 15.0 grams of hydrochloric acid to produce magnesium chloride and hydrogen gas. If the theoretical yield of magnesium chloride is 25.7 grams, calculate the percent yield of the reaction.

asked Jan 22 in Chemical reactions by Cameron54A25 (1.9k points)

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1 answer 69 views

A student performed an experiment to synthesize aspirin using 5 grams of salicylic acid and an excess of acetic anhydride. After the reaction was completed, the student collected 4.2 grams of aspirin. What is the percent yield of this experiment?

asked Jan 22 in Chemical reactions by SteveAdamson (1.7k points)

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1 answer 60 views

A student performed an experiment in which 2.1 moles of nitrogen and 0.8 moles of hydrogen react to form ammonia gas. If the equilibrium constant for the reaction is 3.5 x 10^-4 at a certain temperature, what is the equilibrium concentration of ammonia?

asked Jan 22 in Chemical reactions by SherrylIwz83 (2.0k points)

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