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Calculate the pH of a solution prepared by adding 20.0 mL of 0.100 M HCl to 80.0 mL of a buffer that is comprised of 0.25 M C2H5NH2 and 0.25 M C2H5NH3Cl. Kb of C2H5NH2 = 9.5 x 10-4
Starting with a 0.04 M solution and making a series of 1:100 dilutions, how many dilutions must you make to prepare a solution,
whats the amount of heat required to raise the temperature of 165 g of water from 12.0 C to 88.0 C (sp. heat of H20(l)= 4.18 J/g)
the mineral fluorite is composed of CaF2. the molar solubility of calcium fluoride in water is 2.1x10^-4 moles/L. what is the ksp of CaF2
c5h12, to Co2 and H20 is -3536.3 kJ/mol. What is the enthalpy of formation of pentane at 25 degrees celcuius?
The original conditions in a container filled with gas at constant temperature are 183 mL and 310 mmHg. The desired new volume is 90.6 mL.
Determine the chemical formulas for a covalent compound whose molecules contain 2 carbon atoms, 6 hydrogen atoms and an oxygen atom
What volume of oxygen is needed to react with solid sulfur to form 6.20 L of sulfur dioxide?
What volume of a 6.16E-2 M potassium hydroxide solution is required to neutralize 19.8 mL of a 0.107 M hydroiodic acid solution.
Calculate the volume (in mL) of a 0.740 M KOH solution that should be added to 4.750 g of HEPES (MW=238.306 g/mol, pKa = 7.56) to give a pH of 7.22.
Running a TLC of Unknown Compound X using eluent hexane:ethyl acetate 4:1. The Rf of the unknown is too close to the baseline. What should I do?
Cesium has the smallest ionization energy of all the elements (376 kJ/mol), and chlorine has the most negative electron affinity (-349 kJ/mol).
write an equation for which component of the phosphate buffer (H2PO4-/ HPO4^2-) reacts when HCl is added. Do the same for NaOH.
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