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Need some assistance: 2a) Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate this pH
The most probable mechanism of reactivity for the solvoysis of 2-chloro-norbornane is: a. Sn1 b. Sn2 c. E1 d. E2 The reaction for this secondary compound was very slow going compared to solvolysis o
what compound was condensed in an adol reaction to produce (2E)-5-methyl-2-(1-methylbutyl)oct-2-enal
Platinum crystallizes in a face-centered cubic lattice (the Pt atoms are at the lattice points only). If the density of the metal is 22.3 g/cm3, what is the unit cell edge length in pm
When chromium crystallizes, it forms body-centered cubic cells. The unit cell edge length is 288.7 pm. Calculate the density of chromium
Which of the following expressions hold for 0.10 mol/L Na2HA(aq). (HA2- is the doubly-ionized form of H3A, a weak triprotic acid.)
Name the kinds of attractive forces that must be overcome in order to do the following. (Select all that apply.) Boil liquid ammonia dipole-dipole forces dispersion forces hydrogen bonds ion-dipole
Sulfurous acid, H2SO3, is a weak diprotic acid (pKa,1=1.89 and pKa,2=7.21 at 25oC). What is the pH of 0.121 mol/L H2SO3(aq) at 25oC.
Calculate the concentration of all the species, ions, and molecules, and the pH of the following solutions. All solutions have a total volume of 1.00 liter and contain
If the antacid for analysis is known to be Phillips' Milk of Magnesia, the solution does not need to be heated, but if the sample is Mylanta, the solution must be heated. Explain the difference in e
CCl4 dipole-dipole dispersion ion-dipole ion-ion (b) CsBr dipole-dipole dispersion ion-dipole ion-ion (c) BaCl2 dipole-dipole dispersion ion-dipole ion-ion
Estimates show that the total energy output of the sun is 5X10^26 J/s. What is the corresponding loss in Kg/s of the sun in scientific notation
Saturated Calomel Electrode || Titration Solution | Ag (s) Calomel Electrode: E=0.241V For Ag+ + e- ---> Ag(s), E0 = 0.79993 V. AgI is Ksp = 8.3 × 10-17. What it the volts at equivalence po
Calculate the amount (in mL) of a 1.520M NaOH that is required to add the following acetic acid solutions to prepare a buffer with the corresponding pH: pKa of acetic acid = 4.74
What is the pH of the equivalence point of the two solutions if you then titrate these solutions separately with the NaOH solution? The Ka for acetic acid is 1.8e-5.
The elements contained in acetylsalicyic acid are hydrogen, carbon, and oxygen. The combustion of 3.000 g of the pure compound yields 1.200 g of water and 3.72 L of dry carbon dioxide, measured at S
The volume of .05 M KOH solution that contains the same number of mmol as .1 mL of tert-butyl bromide? For the number of mmol of tert-butyl bromide, I got .8912 mmol.
Compare the temperature of your water bath at the time of reflux with the boiling point of your solvent
Calculate the pH of a buffer solution that is 0.423 M in H3BO3 and 0.199 M in NaH2BO3. The Ka of H3BO3 is 5.8e-10. a) The pH of this solution
Does (CH3CH2)2C=CHCH2CH3 have any cis/trans isomers and if so what are they? Also what's the compound structure?
Acetic acid, CH3COOH, is a weak monoprotic acid (pKa=4.74 at 25oC). What is the pH of 0.191 mol/L CH3COOH(aq) at 25oC
Give the structure for an isomer of compound A that has a melting point that is appreciably different from that of A yet NMR spectra that are almost identical to those of A. Include wedge/dash bonds
Provide a structure for the following compound: C9H10O3; IR: 2400-3200, 1700, 1630 cm-1; 1H NMR: ? 1.53 (3H, t, J = 8 Hz); ? 4.32 (2H, q, J = 8 Hz); ? 7.08, ? 8.13 (4H, pair of leaning doublets, J =
Calculate the energy difference (E) for the transition from n = 1 to n = 4 energy levels of hydrogen per 1 mol of H atoms.
Sulfurous acid, H2SO3, is a weak diprotic acid (pKa,1=1.89 and pKa,2=7.21 at 25oC). What is the pH of 0.121 mol/L H2SO3(aq) at 25oC? Give your answer accurate to two decimal places.