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(a) To a 100 mL volumetric flask were added 40.0 mL of a 0.500 M aqueous solution of sodium dihydrogenphosphate, 4.80 g of solid sodium monohydrogenphosphate monohydrate, and 2.00 mL of 6.00 M HCl. The flask was filled to the calibration mark with water, and the contents were thoroughly mixed. What were the equilibrium concentrations of H+, Na+, H2PO-4 , and HPO-2 in the resultant solution? Ka1 = 7.1x10-3, Ka2 = 6.3x10-8, and Ka3 = 4.2x10-13 for phosphoric acid?
(b) Was the resultant solution in the volumetric flask in Part a a buffer solution?
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In 1773 Ben Franklin poured a teaspoon of oil onto a pond. He observed that it spread out to form a film that covered an area of about 22,000 ft2. If a teaspoon has a volume of about 5 cm3 and if the film was roughly one molecule thick, then what ..
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Why does surface complex formation with a weak acid lead to a relative maximum in the extent of surface complex formation (adsorption) at a pH which is usually near the value of -log acidity constant of the weak acid (pKHA)
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