Hot questions

0 votes

1 answer 88 views

A solution contains 0.1 M of an unknown ion X. The electrode potential of this ion X is measured to be +0.60 V versus the standard hydrogen electrode (SHE). Calculate the concentration of ion X in the solution using electrochemical methods.

asked Jan 22 in ElectroChemistry by VickeyBatema (1.9k points)

0 votes

1 answer 99 views

A 0.25 mol/L solution of ethanoic acid (CH3COOH) is mixed with a 0.40 mol/L solution of sodium acetate (CH3COONa). The equilibrium constant for the reaction CH3COOH + NaCH3COO ⇌ CH3COONa + H2O is 1.8 x 10^-5. What is the concentration of CH3COONa at equilibrium?

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

0 votes

1 answer 99 views

How does the specific surface area of a solid catalyst affect the rate of reaction for the decomposition of hydrogen peroxide?

asked Jan 22 in Surface Chemistry by DanielleVanw (2.3k points)

0 votes

1 answer 90 views

A chemistry student wants to measure the rate of a chemical reaction. The reaction involves the reaction between zinc and hydrochloric acid. The student weighed out 0.5 grams of zinc and mixed it with 50 mL of 0.5 M hydrochloric acid. The student measured the time it took for the reaction to complete and found it took 3 minutes to produce all the hydrogen gas. Calculate the rate of the reaction in grams of zinc per minute.

asked Jan 22 in Chemical reactions by ClarkPuig93 (2.0k points)

0 votes

1 answer 95 views

A chemistry student is trying to determine the boiling point of a solution containing 30 grams of glucose (C6H12O6) dissolved in 100 grams of water. Given that the boiling point of pure water is 100°C and the elevation constant for water is 0.512°C/m, what is the boiling point of the solution?

asked Jan 22 in Physical Chemistry by MaybellHoffm (2.2k points)

0 votes

1 answer 126 views

What is the oxidation state of manganese in potassium permanganate (KMnO4)?

asked Jan 21 in Inorganic Chemistry by JewelSchaffe (1.8k points)

0 votes

1 answer 128 views

What is the pKa value of acetic acid and what is the pH of a 0.1 M acetic acid solution when it is in equilibrium with its conjugate base, acetate ion?

asked Jan 21 in Organic Chemistry by BonnieSayre (2.1k points)

0 votes

1 answer 94 views

A chemistry student needs to determine the effect of decreasing the temperature on the equilibrium position of the reaction N2(g) + 3H2(g) <-> 2NH3(g) if the initial concentrations of N2, H2 and NH3 are 0.4 M, 0.6 M, and 0.8 M respectively. How does the equilibrium concentration of NH3 change if the temperature is decreased from 400 K to 300 K, assuming constant volume and pressure?

asked Jan 22 in Chemical equilibrium by AzucenaGrasb (1.6k points)

0 votes

1 answer 95 views

A chemistry student is given the following information: A galvanic cell is set up consisting of a copper electrode in a copper (II) ion solution connected by a salt bridge to a silver electrode in a silver ion solution. The concentration of the copper (II) solution is 0.10 M and the concentration of the silver ion solution is 0.025 M. The measured potential of the cell is 0.66 V. Calculate the resistance of this electrochemical cell.

asked Jan 22 in ElectroChemistry by ChristieNobl (2.0k points)

0 votes

1 answer 83 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)

0 votes

1 answer 90 views

A chemistry student wants to determine the reaction rate of a chemical reaction. They mix 8 grams of reactant A with 12 grams of reactant B in a beaker at room temperature. After 10 seconds, they observe that the mass of the beaker's contents has decreased by 2 grams. What is the reaction rate of the chemical reaction?

asked Jan 22 in Chemical reactions by HildredU3922 (1.9k points)

0 votes

1 answer 82 views

A zinc electrode was kept in a 0.1 M ZnSO4(aq) solution, and a copper electrode was kept in a 0.1 M CuSO4(aq) solution. When 1500 C of electricity was passed through the cell, how many grams of copper were deposited on the cathode? (Assume 100 % efficiency and the Faraday constant is 96500 C/mol)

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

0 votes

1 answer 89 views

A copper wire is exposed to a solution containing 0.2 M NaCl. The corrosion rate of the wire is found to be 5.8 microAmp/cm². Calculate the corrosion current density of the copper wire in the given environment.

asked Jan 22 in ElectroChemistry by KaitlynRodri (2.0k points)

0 votes

1 answer 128 views

What is the pKa of the primary amine ethylamime if its pH in solution is 9.0?

asked Jan 21 in Organic Chemistry by CalebHartman (2.0k points)

0 votes

1 answer 81 views

Balance the chemical equation for the reaction of sulfur dioxide (SO2) with oxygen (O2) to form sulfur trioxide (SO3).

asked Jan 22 in Chemical reactions by LXJGinger283 (2.2k points)

0 votes

1 answer 87 views

A solution of 0.1 M AgNO3 was electrolyzed using a current of 0.5 A for 150 seconds. If 0.15 g of silver was deposited, what is the value of the Faraday constant?

asked Jan 22 in ElectroChemistry by FranY1408156 (2.2k points)

0 votes

1 answer 100 views

A certain hydrocarbon requires 343 kJ of energy to break one mole of carbon-carbon bonds and 413 kJ/mole to break one mole of carbon-hydrogen bonds. What is the bond dissociation energy of the carbon-carbon and carbon-hydrogen bonds in this hydrocarbon?

asked Jan 22 in ThermoChemistry by LovieCastles (2.3k points)

0 votes

1 answer 82 views

A student wants to know how changing the volume affects the position of the equilibrium for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g). If the reaction is initially at equilibrium in a 2 L container at 400 K and then the volume is decreased to 1 L, what will be the new concentrations of each gas at equilibrium? (Assume that the pressure remains constant and that the reaction follows the ideal gas law.)

asked Jan 22 in Chemical equilibrium by XHQMikel9006 (2.0k points)

0 votes

1 answer 128 views

What is the major product of the reaction between 2-methyl-2-pentanol and conc. HBr?

asked Jan 21 in Organic Chemistry by FrancisBurch (1.7k points)

0 votes

1 answer 89 views

A chemistry student wants to measure the surface tension of a liquid but does not have access to a tensiometer. How can the student measure the surface tension using simple materials found in a chemistry lab?

asked Jan 22 in Surface Chemistry by ZellaSeamon3 (1.6k points)

Categories