Given the pKa of hypochlorous acid, HOCl, is 7.54.   What is the pH of a solution which consists of 0.20 M HOCl and 0.70 M OCl-?

An analytical chemist is titrating 179.6 mL of a 0.8400M solution of cyanic acid (HCNO) with a 1.200M solution of KOH. The p K, of cyanic acid is 3.46. Calculate the pH of the acid solution after the chemist has added 144.3 mL of the KOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of KOH solution added. Round your answer to 2 decimal places. pH = |

Which of the following is true of a buffer solution that contains equivalent amounts of acid and conjugate base?     The pH will always be greater than 7, regardless of the acid and conjugate base.     The pH of the solution will be equal to the pKa of the acid.     The pH of the solution will be equal to Kw.     The pH will be equal to the concentration of the conjugate base.     The pH will be equal to the concentration of the acid.

Calculate the pH of a buffer solution prepared by dissolving 0,48 mole of sodium fluoride (NaF) and 1.0 mole of hydrofluoric acid (HF) in enough water to make 1.0 liter of solution. [K(HF) = 6,8 x 1o-j Your answer should have 2 sig figs

4-(N-Morpholino)butanesulfonic acid (MOBS) is a weak acid used to prepare buffers for biological samples through combination with strong bases. How many mL of 0.626 M KOH should be added to 5.00g of MOBS (pKa=7.48 and formula mass is 223.29 g/mol) to give a pH of 7.40

An analytical chemist is titrating 102.2 mL of a 0.5200 M solution of nitrous acid (HNO,) with a 0.5400 M solution of KOH. The p K of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 21.31 mL of the KOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of KOH solution added. Round your answer to 2 decimal places. db pH = Explanation Check © 2021 McGraw Hi Education. All Rights Reserved. Terms of Use Pivacy Accessibitity 5:12 PM P Type here to search 5/8/2021 prt sc delete home end 144 14 4O 144 num lock %23 3. 96 backspace 4. 8. 7. Y. home

Given that Ka’s for hydrofluoric acid (HF) and boric acid (H3BO3) are 6.3 × 10^–4and 5.4 × 10^–10, respectively, calculate the pH of the following solutions: (a)The mixture from adding 50 mL 0.2 M HF to 50 mL 0.5 M sodium borate (NaH2BO3).  (b)The mixture from adding an additional 150 mL 0.2 M HF to the solution in (a), i.e., a total of 200 mL 0.2 M HF was added to 50 mL 0.5 M NaH2BO3.

A lake has a surface area of 18 square kilometers and an average depth of 6 m.The average pH of the lake is 6.9. How many tons of acid rain—in the form ofH2SO3—would reduce the pH of the lake from 6.9 to 3.2?

. Calculate concentration of hydronium ion, hydroxide ion, and pH at 25 oC in:   (a) 0.15 M HNO 3,   (b) 0.010 M Ca(OH)2.

An analytical chemist is titrating 88.2 mL of a 0.2300M solution of nitrous acid (HNO₂) with a 0.5500M solution of NaOH. The pK, of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 15.8 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places. pH = 11 ? 0