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A 0.1 M solution of ammonia (NH3) has a pH of 11.64 at room temperature. If sodium hydroxide (NaOH) is added to this solution such that the concentration of OH- ions becomes 0.01 M, what will be the new pH of the solution? (Assume that the dissociation of water can be ignored)

asked Jan 22 in Chemical equilibrium by PalmaYuille (2.2k points)

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What is the mechanism and product produced when 2-methylbut-2-ene undergoes a Wagner-Meerwein rearrangement reaction in the presence of concentrated sulfuric acid?

asked Jan 21 in Organic Chemistry by AgnesXyg5256 (2.3k points)

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A chemistry student needs to calculate the heat of hydration for the reaction between anhydrous magnesium chloride (MgCl2) and water (H2O) using the following data: the enthalpy change for the dissolution of anhydrous magnesium chloride in water is -63.3 kJ/mol, and the enthalpy change for the hydration of magnesium ions (Mg2+) and chloride ions (Cl-) is -192 kJ/mol and -131 kJ/mol, respectively. Calculate the overall heat of hydration (in kJ/mol) for the reaction: MgCl2(s) + 6H2O(l) → MgCl2.6H2O(s)

asked Jan 22 in ThermoChemistry by CecileODrisc (2.4k points)

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Calculate the enthalpy change of isomerization for the conversion of cis-but-2-ene to trans-but-2-ene, given the standard enthalpy of formation for both isomers. Asssume all other conditions remain constant.

asked Jan 23 in ThermoChemistry by DelorasGaise (2.3k points)

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A chemist analyzed a sample of unknown substance and found that it contains 55% carbon, 9.17% of hydrogen and the rest of the mass is oxygen. What is the percentage by mass of oxygen in the sample?

asked Jan 22 in Analytical Chemistry by MarilynnAnth (2.2k points)

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1 answer 55 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 BlaineBeasle (2.6k points)

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1 answer 93 views

What is the pH of a 0.1 M solution of acetic acid (CH3COOH) at 25°C, given that the Ka of acetic acid is 1.8 x 10^-5?

asked Jan 21 in Organic Chemistry by VanBohannon (2.5k points)

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What is the oxidation state of carbon in methanol (CH3OH)?

asked Jan 21 in Organic Chemistry by LaunaRxf8120 (2.0k points)

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A zinc rod is being placed in a solution containing 0.1 M of copper (II) ions. Calculate the corrosion potential of the zinc rod in a galvanic couple with a standard hydrogen electrode at 25°C.

asked Jan 22 in ElectroChemistry by ThadGoetz093 (2.3k points)

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A chemistry student needs to determine the concentration of a certain analyte in a water sample using colorimetry. The student has access to a spectrophotometer and a standard calibration curve. What is the concentration of the analyte in the water sample, given its absorbance value in the spectrophotometer and the calibration curve data?

asked Jan 22 in Analytical Chemistry by NorineFelici (2.8k points)

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1 answer 63 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 jozzaumnvuiyulg (2.4k points)

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What is the IUPAC name and molecular formula of the alcohol that has the structural formula CH3CH2CH2OH?

asked Jan 21 in Organic Chemistry by CelsaTroiano (2.2k points)

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Assuming that the student has knowledge about the harmonic oscillator model, the problem could be:Calculate the molecular vibrational frequencies and corresponding infrared spectra of a carbon monoxide (CO) molecule using the harmonic oscillator model. Given the following bond lengths and force constants:- Bond length of the CO bond in the ground state: 1.128 angstroms- Force constant of the CO bond in the ground state: 1880 N/m

asked Jan 22 in Quantum Chemistry by LeilaniPage7 (2.2k points)

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Identify the product formed when 3-methylbutan-2-ol is reacted with PCl5 in the presence of anhydrous AlCl3. Write the balanced equation for the reaction and also name the type of reaction.

asked Jan 21 in Organic Chemistry by CedricNicker (3.3k points)

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A chemistry student needs to determine the oxidation state changes of the atoms and identify the oxidizing and reducing agents in the following reaction: C2H5OH + 2 MnO4- → 2 CH3COOH + 2 MnO2 + 4 OH-

asked Jan 22 in Organic Chemistry by CandelariaFe (2.3k points)

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1 answer 94 views

How can chemistry educators effectively teach the applications of chemistry in various industries, such as pharmaceuticals, agriculture, and manufacturing, to help students understand the role of chemistry in society and the economy?

asked Jan 21 in Chemical education by BlairMorrill (2.6k points)

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1 answer 92 views

What is the pH of a 0.1 M solution of acetic acid (CH3COOH) if its dissociation constant (Ka) is 1.8 x 10^-5?

asked Jan 21 in Organic Chemistry by EmilyUtley95 (2.1k points)

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1 answer 90 views

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

asked Jan 21 in Inorganic Chemistry by ShanicePeele (2.9k points)

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1 answer 93 views

Identify the number of possible stereoisomers for a molecule with the molecular formula C5H10O that contains one chiral carbon. Draw all the possible structures indicating their configurations as R or S.

asked Jan 21 in Organic Chemistry by Latonya89F54 (2.3k points)

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How many possible chain isomers can be formed for a compound with the molecular formula C5H12?

asked Jan 21 in Organic Chemistry by KatjaQuinone (3.2k points)

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