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A buffer that is 0.210 M in acid, HA, and 0.172 M in the potassium salt of its conjugate base, KA, has a pH of 4.66. What is the pH of the buffer after 150. mL of 0.359 M LiOH is added to 0.950 L of this buffer? Assume that the volumes are additive.
a 45.0 g aluminum block initally at 28.0 celsius absorbs 825 joules of heat. what is the final temperature of the
What is the pH of a 1.2 x 10-4 M solution of KOH? What is the hydronium concentration of this solution?
On the gas chromatography graph, 3 peaks will result along with the fourth peak being the starting material, which is suppose to be a small peak. What factors could contribute to the starting material peak to be very large
Write an equation for the sequential hydroboration and H2O2/OH ¯ oxidation of 4-ethyl-3- heptene. Indicate the main monosubstitution products in each of the following reactions.
A second-order reaction has a rate constant , k, of 0.90 1/M.min. If the initial concentration of the reactant is 2.25 M , what will be the concentration of reactant after 10 minutes?
Draw the product of the following reactions and indicate whether the product would be (R),(S), racemic, or achiral. A) (R)-2-butanol + conc.H2SO4, heat, then HBr--->
Why do you sweat? Please use all the thermochemical terminologies( endothermic, exothermic, eat transfer, and whatever else is appropriate)
Calculate the pressure exerted by 20 gram-moles of ammonia at 300 K in a 5-liter container, using : a. the ideal gas equation b. the SRK equation
How are moles, masses, and volumes of gases calculated from one another for a gas at STP
what are the h3o and oh- concentrarions in a 125 ml solution prepared with 0.100 mol pf naoh and
Determine the Ka of a 0.1M solution of acetic acid in which the hydronium ion concentration is 1.35 x 10^-3 M
Calculate the Ecell for the reaction below when [Zn2+] = 1.00M, [H+] = 1.00 x 10-6 M and PH2 = 1.00 atm Zn (s) + 2H+ ----> Zn2+ + H2 (g) a.+0.76 V b. + 0.64 V c. + 0.41V d. + 0.053 V e. + 1.12 V
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