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Question 1: HA is a weak acid. Its ionization constant, Ka, is 5.3 x 10-13. Calculate the pH of an aqueous solution with an initial NaA concentration of 0.079 M.
Question 2: We place 0.148 mol of a weak acid, HA, in enough water to produce 1.00 L of solution. The final pH of the solution is 1.27 . Calculate the ionization contant, Ka, of HA.
Question 3: We place 0.694 mol of a weak acid, HA, and 11.9 g of NaOH in enough water to produce 1.00 L of solution. The final pH of this solution is 4.74 . Calculate the ionization constant, Ka, of HA.
How many grams of solid calcium hydroxide Ca(OH)2 are required to prepare 200 mL of a 0.05 M solution. Molar mass (formula weight) of Ca = 40.1 g/mol, O = 16.0 g/mol, and H = 1.01 g/mol.
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Determine the answer to each of the following: a) the number of unpaired electrons in the Mn2+ ion: show valence orbital diagram b) a possible set of quantum numbers (n, l, ml, ms) for an electron occupying a 5p orbital
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