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Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L-1 CH3CH2NH2 (aq) is titrated with 0.150 mol L-1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which this titration is based, and indicate clearly which atom is being protonated. Then, calculate the equilibrium constant for the neutralization reaction. (Hint: To calculate the equilibrium constant, you may find it helpful to represent the neutralization reaction as the sum of two separate reactions.) (b) Calculate the pH, [CH3CH2NH2], and [CH3CH2NH3+] at the following stages of the titration. i) before the addition of any HI solution. ii) after the addition of 20.0 mL of HI solution. iii) at the equivalence point. iv)after the addition of 60.0 mL of HI solution.
Calculate the heat released when 2.82 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and 1 atm to form sodium chloride.in kJ
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How many milliliters of a 0.56 M HCl solution do you need to obtain 0.0046 mol of HCl?
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Five hundred liters of a gas are cooled from 20°C to 10°C while the pressure remains constant.what the new volume will be?
At a certain temperature the vapor pressure of pure benzene and pure toluene are 380 torr and 130 torr, respectively.
A 2.30 L sample of neon at 5.35 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 7.00 atm after the neon is added, what was the original pressure (in atm) of argon in the cylinder?
Calculate the delta Hrxn for the following equation- 4KNO3(s) - - > 2K2O(s) + 2N2(g) + 5O2(g)
What is the sequence of the peptide? Use the one-letter abbreviations for the amino acids, and do not use dashes.
What is the ratio of oxygen atoms to hydrogen atoms in the mineral cacoxenite, Fe4(PO4)3(OH)3 • 12H2O?
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