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
Calculate the approximate pH of an aqueous solution of ammonium chloride, NH4Cl , 0.03 M, and...
Calculate the approximate pH of an aqueous solution of a mixture of CH3COOH, 0.27 M, and CH3COONa, 0.15 M, at 25°C. (Note: consider one decimal place for the pH answer.) pKa = 4.76.
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.
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.
Calculate the approximate pH of an aqueous solution of sodium carbonate Na2CO3 , 0.28 M, at 25°C. (Note: consider one decimal place for the pH answer.) pKa H2CO3 /HCO3− = 6.35, pKa HCO3- /CO32-= 10.30
QUESTIONS What is the pH of a 0.150 M aqueous solution of ammonium chloride (NH4Cl-)2 Kb (NH3)-1.2 x 10-5 0 A. 4.77 0 B.6.26 U 0 0 O D. 4.95 E. 4.84
Calculate the approximate pH of an aqueous solution of H2S , 0.05 M, and H3PO4, 0.21 M at 25°C. (Note: consider one decimal place for the pH answer.) pKa H2S/HS- = 7.02, pKa HS-/S2- = 13.99 pKaH3PO4/ H2PO4- =2.15, pKaH2PO4-/HPO42-=7.15, pKa HPO42-/ PO43- =12.38
What is the pH of a 0.250 M aqueous solution of ammonium chloride (NH4+Cl-)? Kb (NH3) = 1.2 × 10-5 A. 5.04 B. 4.95 C. 4.77 D. 4.84 E. 6.26
What is the pH of a 0.820 M solution of ammonium chloride, NH4Cl? At 25 °C, ko for ammonia, NH3, is 1.8 x 10-5: Kw = 1.0 x 10-14 Select one: Ca. 4,67 b. 5.49 OOO c. 4.34 d. 0.09 e. 2.42
Calculate the approximate pH of a 1% w/v Ammonium Chloride Solution. MW=53.5 pkb of Ammonium Hydroxide= 4.76
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: