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a. You have 50 mL of a buffer solution that is 0.15 M in HA and 0.25 M in A-. Calculate the pH of the solution after you add 100 mL of 0.01 M HCl to the solution. The pKa of HA is 4.75. b. You wish to prepare 100 mL of a buffer solution that is 0.025 M in carbonic acid (H2CO3). The pKa of H2CO3 is 6.351. Calculate the amount of H2CO3, in grams, that you will need to weigh out. c. You wish to prepare 100 mL (total volume) of a buffer solution that is 0.025 M in carbonic acid, pH 7.25. You have solid H2CO3 and solid NaHCO3. Calculate how many grams of H2CO3 and HCO3- you need to weigh out to prepare this solution. pKa=6.351
The acid-dissociation constants of sulfurous acid (H2SO3) are Ka1= 1.7 x 10^-2 and Ka2 = 6.4 x 10^-8 at 25 degrees celcius. Calculate the pH of a 0.163 M aqueous solution of sulfurous acid.
Dissolve Ca(OH)2(s) into a 100 mL solution containing 2.00g of dissolved CaCl2. The satureated Ca(OH)2 solution has an equilibrium pH of 11.68. Determine the molar solubility and the Ksp for Ca(OH)2 from this single pH measurement.
Historically, the solid residue that is left after the Dichloromethane -or methylene chloride (CH2Cl2 )solution is evaporated has a lower melting point that its literature value, due to impurities.
Procedure General flow and logic Temperatures Times Solvents Techniques used to make the products At least one test (your choice) to verify your product the reaction of 2 methyl 2 octene with HBr reacting with heat and CH3Br
How many grams of calcium hydroxide is produced when 3.2 micrograms of CaC2 reacts with 5.1 micrograms of water?
how much heat in is evolved in converting 1.00 of steam at 160.0 to ice at -55.0? the heat capacity of steam is 2.01
stock soultions of thris base and tris acid how much of each would you use to make 100ml
To compute the mass of aluminum necessary for the reaction, we first must find the moles of iron (II) oxide. The molar mass of FeO is 71.85 g.mol the unit factor is.
Identify the two important classes of catalysts. Choose a catalyst that exists in the human body. Explain its importance and how it works.
the reduction table in your notes, calculate the standard cell potential for the following reaction. F2(g) + 2 Cl-(aq) 2 F-(aq) + Cl2(g)
The VOA (Voice of America) broadcasts at 18.3 MHz for the Greenville Relay Station. What is the frequency and wavelength of the electromagnetic radiation and what is the energy of the photons and the speed of the electromagnetic wave
Calculate the mass in grams of hydrogen chloride produced when 5.95 L of molecular hydrogen measured at STP reacts with an excess of molecular chlorine gas.
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