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What is the pH of a solution containing 0.401 mol L-1 of HBr and 0.535 mol L-1 of a weak acid with pKA = 6.59 ?
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- What is the pH of a 250.0 mL solution that contains 3.17 g of potassium monohydrogen phosphate and 3.90 g of potassium dihydrogen phosphate? Use pKa values of 12.7, 7.2 and 2.1 for phosphoric acid.What is the pH of a buffer solution that contains 0.245 M weak acid and 0.450 M of the conjugate base? The pKa for the acid is 5.53.What is the pH of a buffer solution that contains 0.180 M of a fictitious base and 0.135 M of its conjugate acid? The pK b of the base is 5.720.
- What is the pH when preparing a solution od 1 mol NaOH and 2 mol of solid NaH2PO4? The pKa's of phosphoric acid are: 2.1, 7.2, and 12.4.6. If 25.1 mL of 0.109M acid with a pKa of 5.27 is titrated with 0.108 M NaOH solution, what is the pH of the titration mixture after12.0 mL of base solution is added?1. The acetate buffer contains 0.200 M acetic acid and 0.0500 M sodium acetate. Giventhat the Ka of acetic acid is 1.76 x 10-5, calculate the pH of the buffer solution.
- Calculate the acid ionization constant (pKa) for the acid with a 0.775 M solution of a weak acid (HA) that has a pH of 3.38.What will be the pH of a buffer solution containing an acid with a pKa of 5.4 with an acid concentration equivalent to that of its conjugate base?What is the pH of a buffer solution that contains 0.305 M of a fictitious weak acid and 0.469 M of its conjugate base? The pK a of the acid is 4.275.
- A hypothetical weak acid, HA, was combined with NaOH in the followingproportions: 0,20 mol HA, 0,08 mol NaOH. The mixture was diluted to a totalvolume of 1,0 L and the pH was found to be 4,80. a). What is the pKa of the acid?A weak acid has Ka of 4.47 x 10-4. What is pKa for this weak acid?What is the pH of a solution containing 0.1M acetic acid with pka of 4.86?