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Write an equation for the dissociation or ionization in water of each of the following weak acids or weak bases.
a.) (CH3)2NH2+
b.) [Co(H20)6]3+
c.) (C2H5)2NH
d.) CH3COO-
e.) CH3CH2COOH
how many grams of water can be cooled from 45 c to 23 c by the evaporation of 63 of water? the heat of vaporization of
A buffer is prepared by mixing 500 mL of 1.50 M Ch3COOH with 250 mL of 1.00 M CH3COONa. What is the pH of the buffer system after the formation of 0.15 moles of OH- from a secondary reaction with the buffer. (Ka for acetic acid = 1.7 x 10^-5)
Determine the exact molarity of NaOH (aq), when a sample of KHC8H404 dissolves in water and is titrated with 24.03 mL of NaOH(aq).
Calculate pH of a solution of L-glutamic acid in which the ionic species with net charge=-1 is 5 times greater than that of the isoelectric structure
A 10.00 mL aliquot of weak base is titrated with HCl. The equivalence point is reached after 17.21 mL of 0.4332 M HCl has been added. The pH is equal to 10.03 after 5.00 mL of HCl was added. Determine:
When 1 liter of nitrogen gas reacts with 3 liters of hydrogen gas at constant temperature and pressure, how many liters of ammonia gas will be produced?
Is it possible to prepare a buffer using HNO2? What is the expected pH range. Why is it seldom used to prepare buffer solutions
A bottle of wine contains 13.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
calculate avaerage rate of decomposition of H2O2 between 0 & 4.32 x 10^4 s.
A 10.0 mL aliquot of this weak acid solution was titrated with a 0.0498 M NaOH solution. The equivalence point was reached by adding 11.62 ml of NaOH from the buret. What is the molar mass of this unknown acid
what is the difference between oxy-mercuration, hydroboration, and acid hydrogenation
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
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