How many grams of solid ammonium chloride should be added to 0.500 L of a 0.190 M ammonia solution to prepare a buffer with a pH of 9.850? Mass = 0.936 g

3. A buffer solution contains 0.125 moles of ammonium chloride added to 500.0 ml of 0.500 M solution of ammonia. A) What is the pH of this buffer? B) What is the pH after the addition of 0.0100 moles of HCI bubbled into 500.0 mL of the buffer?

How many moles of sodium hydroxide would have to be added to 225 mL of a 0.349 M nitrous acid solution, in order to prepare a buffer with a pH of 3.570? moles

How many grams of dry NH4Cl need to be added to 2.50 L of a 0.300 M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8×10−5 . (Please type answer no write by hend)

8b.

7. A solution was made by mixing 50.0 mL of 0.750 M HCN with 25.0 mL of water. What is the pH of this solution? The pka of HCN = 9.31. 8. One of the compounds featured on the TV series "Breaking Bad" was hydrofluoric acid (HF), pKa = 3.14. a) A solution of HF has a pH = 1.77. What was the initial [HF] for this solution in mol L-1? b) What is the equilibrium concentration of F in this solution in mol L-1? c) What is the percent ionization of HF in this solution?

An aqueous solution contains 0.386 M dimethylamine ((CH3)2NH).How many mL of 0.379 M perchloric acid would have to be added to 250 mL of this solution in order to prepare a buffer with a pH of 10.800.

What is the pH of a buffer made by dissolving 0.2 mol of KBrO and 0.6 mol of HBrO in 850 mL of solution? What is the pH if the solution is diluted to 2 L?

22. Which of the following will give a buffer solution when equal volumes of the two solutions are mixed? (a) 0.10 M HNO, and 0.10 M NaNO, ( b) 0.10 M HC,H,O, and 0.10 M Nac,H,O, (c) 0.10 M HC,H;O, and 0.20 M NaOH (d) 0.10 M HI and 0.20 M NaBr

100. mL of 0.200 M HCl is titrated with 0.250 M NaOH. What is the pH of the solution after 50.0 mL of base has been added? What is the pH of the solution at the equivalence point?