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A 0.115 M solution of an unknown weak acid (HA) has a pH of 2.57. I determined the acid ionization constant (Ka) for the acid to be: Ka = 2.53 X 10-6. What is the weak acid and what is Kb for the conjugate base of the weak acid?
When acetic anhydride is dessolved in water it forms acetic acid according to the balanced chemical reaction. Calculate the theoretical yield (in grams of acetic acid, FW 60.05 g/mol) if 8.79mL of acetic anhydride
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.190 M HClO(aq) with 0.190 M KOH(aq). The ionization constant for HClO can be found here.
Calculate the change in internal energy of the system and determine whether the process is endothermic or exothermic: a) a balloon is heated by adding 850J of heat. It expands,
A 20.0 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added.
Calculate the volumetric size of a water molecule in vapor, assuming 1 mole of the vapor occupies 22.4 L, as if the vapor were an ideal gas
Calculate the pH at the equivalence point for the titration of 0.200 M methylamine (CH3NH2) with 0.200 M HCl.
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
What is the molarity of that forms when 20.0 of zinc completely reacts with according to the following reaction? Assume a final volume of 285 .
What is the kinetic energy in joules of a 1183 motorcycle moving at 63.
The vapor pressure of pure CCl4 at that temperature is 143 torr and the vapor pressure of the pure unknown is 85 torr. What is the molar mass of the unknown?
A 1.30 M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/cm3. Calculate the mass percent, molality, mole fraction, and normality of the citric acid. Citric acid has three acidic protons.
If One gram (1.5 g) of glyceryl trioleate is completely hydrogenated.How many grams of hydrogen was used in the process.
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