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Describe the process of fermentation including the starting material, the role of yeast, the reaction conditions an a balanced chemical equation for the reaction.
Consider a solution initially containing 0.40 mol fluoride anion and 0.30 mol of hydrogen fluoride (HF). What is the pH after addition of 0.20 mol of HCl to this solution? (HF, Ka = 7.2 × 10(–4))?
Arrange the following species in order of (a) increasing ionic radius, and (b) increasing ionization energy: O2-, F-, Na+, Mg2+. Explain your answer in terms of nuclear charge and charge of ions.
Elements with very large ionization energies also tend to have highly exothermic electron affinities. Explain. Which group of elements would you expect to be an exception to this statement?
Elements with very large ionization energies also tend to have highly exothermic electron affinities. Explain. Which group of elements would you expect to be an exception to this statement?
When 8.00 grams of methane reacts it produces 2.4 L of hydrogen gas at 300 K. What is the pressure of the
hydrogen gas?
Determine the [H+] , [OH−] , and pH of a solution with a pOH of 2.81 at 25 °C.
[H+]=
[OH−]=
pH=
Determine the [H+] , [OH−] , and pOH of a solution with a pH of 8.42 at 25 °C.
[H+]=
[OH−]=
pOH=
Determine the [H+] , pH, and pOH of a solution with an [OH−] of 7.2×10−8 M at 25 °C.
[H+]=
pH=
pOH=
Determine the [OH−] , pH, and pOH of a solution with a [H+] of 4.8×10−11 M at 25 °C.
[OH−]=
pH=
pOH=
