Your supervisor asks you to prepare 474.00 mL of ammonium buffer solution 0.1 M with pH= 9.00, from a concentrated ammonia solution (16%w/w, d=0.98g/mL) and solid ammonium chloride (97% w/w). (MW of NH3 = 17.031 g/mol and FW of NH4Cl = 53.491 g/mol and pKa NH4+/NH3 =9.24). How many grams of the solid ammonium chloride do you need? Consider two decimal places for the answer.
Your supervisor asks you to prepare 474.00 mL of ammonium buffer solution 0.1 M with pH=...
A buffer solution consists of 0.00300 M ammonia (NH3) and 0.00500 M ammonium chloride (NH4Cl). What is the change in pH when 0.00100 moles of NaOH are added to one litre of the solution without any change in volume? The pKa of NH4+ is 9.24.
An ammonia buffer solution contains 0.24 M NH4+ and 0.21 M NH3. The pka of ammonium is 9.24. What is the pH of the buffer? Answer:
Calculate the approximate pH of an aqueous solution of ammonium chloride, NH4Cl , 0.03 M, and sodium acetate, CH3COONa, 0.12 M at 25°C. (Note: consider one decimal place for the pH answer.) pKa NH4+/NH3 = 9.24 pKa CH3COOH/CH3COO- = 4.76
You must prepare 100.00 mL of a 0.25 M a buffer at pH = 5.00. The following imaginary buffers are available to you: HA (pKa = 2.61; MW = 99.32 g/mol) HY (pKa = 7.55; MW = 76.31 g/mol) HW (pKa = 4.51; MW = 100.52 g/mol) b. What is the ratio of base species to acid species (141) a. Which weak acid should be used to make the buffer? (2 pts) needed for the buffer according to the Henderson-Hasselbalch...
How many grams of solid ammonium chloride should be added to 0.500 L of a 0.247 M ammonia solution to prepare a buffer with a pH of 8.470 ? grams ammonium chloride = g.
A buffer solution is prepared by combining 750.0 ml of 1.00 M of ammonia and 250 ml of 1.00 M ammonium chloride. What is the pH of the buffer? ( Ka of NH4+=5.6*10^-10, Kb of NH3= 1.8*10^-5)
A buffer solution is prepared by combining 750.0 ml of 1.00 M of ammonia and 250 ml of 1.00 M ammonium chloride. What is the pH of the buffer? ( Ka of NH4+=5.6*10^-10, Kb of NH3= 1.8*10^-5)
Calculate the pH at 25°C of 220.0 mL of a buffer solution that is 0.350 M NH4Cl and 0.350 M NH3 before and after the addition of 2.40 mL of 6.0 M HNO3. (The pKa for NH4+ = 9.75)
Calculate the pH at 25°C of 189.0 mL of a buffer solution that is 0.420 M NH4Cl and 0.420 M NH3 before and after the addition of 2.80 mL of 6.0 M HNO3. (The pKa for NH4+ = 9.75) pH before= pH after=
A buffer solution is prepared by dissolving 1.600 g of ammonium chloride (NH,CI) into 100.00 mL of a 0.160 M solution of ammonia (NH3). The Kb of ammonia is 1.8 x 10-5. What is the pH of the solution?