Hot questions

0 votes

1 answer 83 views

A student has a solution of AlF3 with a concentration of [AlF3] = 0.015 M, which is in equilibrium according to the equation: AlF3 (s) ⇌ Al3+ (aq) + 3 F- (aq). Calculate the new equilibrium concentration of F- ions if 0.001 mol of NaF is added to the solution initially at equilibrium. (Ksp of AlF3 = 2.0 x 10^-23, NaF is a common ion with F-)

asked Jan 22 in Chemical equilibrium by DeboraFallen (2.1k points)

0 votes

1 answer 124 views

What is the balanced chemical equation for the oxidation of ethanol to ethanoic acid using potassium dichromate(VI) as the oxidizing agent under acidic conditions?

asked Jan 21 in Organic Chemistry by NovellaDegot (1.6k points)

0 votes

1 answer 49 views

Calculate the dipole moment of carbon dioxide (CO2) molecule using ab initio calculations at the HF/6-311+G(d,p) level of theory. How does it compare to the experimentally measured dipole moment value? Explain the reason for any differences observed.

asked Jan 23 in Computational Chemistry by EmmettVerdin (2.2k points)

0 votes

1 answer 78 views

A student wants to find the enthalpy change of a chemical reaction using Hess's Law, but the only information provided is the enthalpy change of two other reactions. Design an experiment to determine the enthalpy change of the unknown reaction using the given data and Hess's Law.

asked Jan 22 in Chemical reactions by IWHJaxon1452 (2.1k points)

0 votes

1 answer 124 views

What is the major product formed when 1-butene undergoes hydration in the presence of H2SO4 and H2O to form an alcohol?

asked Jan 21 in Organic Chemistry by DoloresOtero (1.8k points)

0 votes

1 answer 78 views

A student wants to determine the rate constant of a first-order reaction. The initial concentration of reactant is 0.050 M and after 60 seconds, the concentration drops to 0.025 M. What is the rate constant of the reaction?

asked Jan 22 in Chemical kinetics by RandolphWvo (1.9k points)

+1 vote

1 answer 81 views

What is the oxidation state of sulfur in the compound sodium sulfite (Na2SO3)?

asked Jan 21 in Inorganic Chemistry by JulianaKane (2.2k points)

0 votes

1 answer 85 views

A chemistry student wants to investigate the adsorption of a certain gas onto a solid surface. The student conducts an experiment and obtains the following data for different pressures of the gas:| Pressure (p) / atm | Quantity adsorbed (q) / g ||---|---|| 0.1 | 0.12 || 0.2 | 0.21 || 0.3 | 0.29 || 0.4 | 0.36 || 0.5 | 0.41 || 0.6 | 0.49 |Using the Langmuir adsorption isotherm, the student wants to determine the maximum amount of the gas that can be adsorbed onto the surface (q_max) and the rate constant for the adsorption process (k_ads). What are the values of q_max and k_ads for this gas-surface sys

asked Jan 22 in Surface Chemistry by Margene00368 (1.8k points)

0 votes

1 answer 166 views

What is the name of the theory that proposes that people can be influenced to perform immoral actions by being given an authority figure?

asked Jan 20 in Psychology by Latonya89F54 (2.2k points)

0 votes

1 answer 82 views

A student has 5 grams of sulfur and 8 grams of oxygen. When the two are reacted to form sulfur dioxide, which one is the limiting reactant, and how much sulfur dioxide can be produced?

asked Jan 22 in Chemical reactions by ChasityLearm (2.1k points)

0 votes

1 answer 93 views

A chemical engineer needs to design a distillation column for the separation of a mixture containing ethanol (boiling point of 78.4°C) and water. The desired composition of the distillate is a minimum of 90% ethanol. What is the minimum number of theoretical trays needed in the column to achieve this composition, given that the feed contains 40% ethanol and the reflux ratio is 1.5?

asked Jan 22 in Chemical engineering by Precious09K0 (2.0k points)

0 votes

1 answer 77 views

An unknown compound is synthesized in the lab and needs to be identified using mass spectrometry. Design a step-by-step plan to analyze the compound, including sample preparation, instrument settings, interpretation of data, and identification of possible functional groups.

asked Jan 22 in Analytical Chemistry by BrodieUus47 (1.7k points)

0 votes

1 answer 78 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)

0 votes

1 answer 77 views

A zinc electrode is connected to a copper electrode by a wire in a beaker that has a solution of 0.1 M CuSO4 and 0.1 M ZnSO4. The initial reduction potential of the copper electrode is +0.34 V, and the initial oxidation potential of zinc is –0.76 V. What is the potential difference between the two electrodes at 298 K, and what is the rate of the electrochemical reaction when the cell operates at a current of 2.50 A?

asked Jan 22 in ElectroChemistry by OnaSchnell25 (1.8k points)

0 votes

1 answer 81 views

A student needs to calculate the current density (in A/m^2) in an electrochemical cell with a cross-sectional area of 0.01 m^2 and a current of 0.5 A passing through it. The half-cell reactions are as follows:Anode: Zn(s) -> Zn2+(aq) + 2e^-Cathode: Cu2+(aq) + 2e^- -> Cu(s)The concentrations of Zn2+ and Cu2+ ions in the solutions are 0.1 M and 0.01 M, respectively. The temperature of the cell is 298 K. Calculate the current density.

asked Jan 22 in ElectroChemistry by AudreaV25265 (2.0k points)

0 votes

1 answer 121 views

What is the balanced chemical equation for the reaction between iron(III) chloride and potassium hydroxide to produce iron(III) hydroxide and potassium chloride?

asked Jan 21 in Inorganic Chemistry by IeshaC20996 (1.7k points)

0 votes

1 answer 123 views

What is the major product formed when 1-methylcyclohexene is reacted with ethylene oxide in the presence of catalytic sulfuric acid?

asked Jan 21 in Organic Chemistry by ElviaM111599 (1.4k points)

0 votes

1 answer 95 views

A brass alloy electrode with an area of 5 cm² is immersed in a 0.5 M NaCl solution at 25°C. Given that the standard potential of the electrode is -0.35 V versus a standard hydrogen electrode, calculate the corrosion current density of the electrode in the given environment using Tafel extrapolation.

asked Jan 22 in ElectroChemistry by CaraPrerauer (1.6k points)

0 votes

1 answer 76 views

Assuming complete reaction, a chemistry student added 32 grams of reactant A to a reaction mixture that should produce 28 grams of product B. However, the actual yield of B was only 22 grams. What is the percent yield of product B for this chemical reaction?

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

0 votes

1 answer 95 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 RoderickKyle (2.4k points)

Categories