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- What is the concentration of hydronium ions in (a) a solution that is 0.12 M HBRO(aq) and 0.160 M NaBrO(aq); (b) a solution that is 0.250 M CH 3 NH 2 ( aq ) and 0.150 M CH 3 NH 3 CI ( aq ); (c) a solution that is 0.160 M HBRO(aq) and 0.320 M NaBrO(aq); (d) a solution that is 0.250 M CH 3 NH 2 ( aq) and 0.250 M NaBr(aq)?Calculate the pH, pOH, and fraction of solute protonated or deprotonated in the following aqueous solutions: (a) 0.120 M CH;CH(OH)COOH(aq) (lactic acid), (b) 1.4× 10“M CH;CH(OH) COOH(aq), (c) 0.15 M NH,CI(aq), (d) 0.15 m NaCH;CO,(aq), and (e) 0.112 m (CH;),N(aq) (trimethylamine).Calculate the pH of (a) 0.10 M NH4CI(aq), (b) 0.25 M NaCH3CO2(aq), (c) 0.200 M CH3COOH(aq).
- Write an ionic equation to represent the hydrolysis of the pyridinium ion, and calculate the pH of 0.0482 M C5H5NH+Cl- (aq).Consider the titration of a 50.00 mL sample of 0.500 M hydrazoic acid, HN3, with 0.500 M NaOH (aq., 25 oC). The Ka HN3 = 4.50 x 10–4. What is the pH of the solution after 15.00 mL of NaOH has been added?Estimate the pH of 0.010 M NaCH3CO2(aq).
- Sketch reasonably accurately the pH curve for the titration of 25.0 cm3 of 0.15 M Ba(OH)2(aq) with 0.22 M HCI(aq). Mark on the curve (a) the initial pH, (b) the pH at the stoichiometric point.The pH of 0.40 M HF(aq) is 1.93. Calculate how the pH changes when 0.356 g of sodium fluoride is added to 50.0 mL of the solution. Assume that the volume change is small and can be neglectedCalculate the molar concentration of H3O+ ions and the pH of the following solutions: (a) 25.0 cm3 of 0.144 M HCI(aq) was added to 25.0 cm3 of 0.125 M NaOH(aq), (b) 25.0 cm3 of 0.15 M HCI(aq) was added to 35.0 cm3 of 0.15 M KOH(aq), (c) 21.2 cm3 of 0.22 M HNO3(aq) was added to 10.0 cm3 of 0.30M NaOH(aq).
- Calculate the pH of 0.225 M RbOH(aq).A buffer solution of volume 100 cm3 consists of 0.10 M CH3COOH(aq) and 0.10 MNaCH3CO2(aq). (a) What is its pH? (b) What is the pH after the addition of 3.3 mmol NaOH to the buffer solution? (c) What is the pH after the addition of 6.0 mmol HNO3 to the initial buffer solution?What is the pH of 0.018M C5H5N(aq)?