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Determining the pKa's of acetic acid (CH3COOH) and hydrofluoric acid (HF) (using 20 mL 0.2 M solutions) by measuring the titration curves of the two using 0.2 M NaOH as the titrant. Based on the pKa determined from the titration curve, select the better acid to make a pH 5.0 buffer solution ?
Benzene (l) has a vapor pressure of 0.1269 bar at 298.15 K and an enthalpy of vaporization of 30.72kJmol^-1. The Cpm of the vapor and liquid phases at that temperature are 82.4 and 136.0 J K^-1 mol^-1, respectively. Calculate the vapor pressure of..
A sample weighing 3.183 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3 (molar mass = 101.96). When heat and a stream of H2 gas is applied to the sample
The rate constant of a first-order reaction is 4.60x10^-4 at 415C. If the activation energy is 104 kJ/mol, calculate the temperature in C at which its rate constant is 8.80x10^-4 s^-1.
Draw a possible Lewis structure for a IF7 molecule. List two possible names for this shape. What hybridized orbitals are used by the central iodine atom in this molecule
From the data below, calculate the standard entropy change for the following reaction at 25oC: CaCl2(s) ---> Ca(s) + Cl2(g). Compound H (kJ/mol) So(J/mol-K)
Calculate the delta G at 400K for the following phase change: Sulfur(monoclinic) to sulfur rhombic. Do not assume that delta H or delta S are independent of temperature
Given the quantities of chemicals used in this recipe
A buffer solution contains 0.71 mol of boric acid (H3BO3) and 0.53 mol of sodium dihydrogen borate (NaH2BO3) in 4.00 L. The Ka of boric acid (H3BO3) is Ka = 5.8e-10. pH of buffer solution
Find out the molecular weight of a volatile liquid if its vapor had a density of 2.25 g/l at standard temperature as well as pressure. Explain how do you draw a structural formula for three isomers represented by the formula C5H10 as well as name ea..
Use IUPAC rules to draw and/or name the following organic molecules. (you can draw the carbon chains only with functional groups...)
Calculate the volume of O2 at STP, required for the complete combustion of 175 g octane (C8H18) to CO2 and H2O?
A vessel which is 5 m^3 is filled with propylene. The pressure inside the vessel is 470 psi, and the temperature of the vessel is 25 C. A) How many kg of propylene are in the vessel?
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