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QUESTION 2 Z is a weak base. An aqueous solution of Na2 is prepared by dissolving...
Z- is a weak base. An aqueous solution of NaZ is prepared by dissolving 0.550 mol of NaZ in sufficient water to yield 1.0 L of solution. The pOH of the solution was 4.07 at 25.0 °C. The Kb of Z- is OA 1.3 x 10-11 OB.6.9 x 10-9 OC 2.1 x 10-10 OD.1.3 10-8 OE 2.8 x 10-12
an aqueous solution of NaZ is prepared by dissolving 0.350 mol of NaZ in enough water to yield 1.0 L solution. The pH of the solution is 8.93 calculate kb of z- Start with equation z-+H2O yields HZ=OH- 2.1x 10^-10
QUESTION 7 HZ is a weak acid. An aqueous solution of HZ is prepared by dissolving 0.020 mol of HZ in sufficient water to yield 1.0 L of solution. The pH of the solution was 4.93 at 25.0 °C. The Ka of HZ is _ 1.2 x 10-5 6.9 x 10-9 1.4 x 10-10 9.9 x 10-2 2.8 x 10-12
8) The base-ionization constant of ethylamine (C2H-NH2) is 6.4 x 10-4 at 25.0 °C. The [H*] in a 1.6 x 10-2 M solution of ethylamine is M. 9) Z is a weak base. An 0.350 M aqueous solution of NaZ is prepared. The pH of the solution was 8.93 at 25.0°C. The Ky of Z" is: 10) At 25 C, the pH of a 0.15 M aqueous solution of Csz (the cesium salt of HZ) is 10.70. What is the...
Find the pH of an aqueous solution prepared by dissolving 1.00 g of base B (FW 74.08 g mol-1) plus 1.00 g of conjugate acid BH+ (pKa = 8.04 & FW 110.54 g mol-1) in 0.100 L
1. Calculate the pH of a solution prepared by dissolving 0.850 mol of NH3 and 0.350 mol of NH4Cl in water sufficient to yield 1.00 L of solution. The Kb of ammonia is 1.77 × 10-5 (a) 5.137 (b) 4.367 (c) 9.633 (d) 8.781 (e) 8.863 2. A 0.1 M solution of which of the following willl have the highest pH? (a) KCN, Ka of HCN = 4.0x10-10 (b) NH4NO3, Kb of NH3 = 1.8x10-5 (c) NaOAc, Ka of HOAc...
QUESTION 14 Calculate the pH of a solution prepared by dissolving 0.270 mol of formic acid (HCO2H) and 0.230 mol of sodium formate (NaCO2H) in water sufficient to yield 1.00 L of solution. The Ka of formic acid is 1.77X104 Enter your answer with three decimal places.
Calculate the pH of a solution prepared by dissolving 0.050 mol of benzoic acid (HA) and 0.50 mol of sodium benzoate (A-) in water sufficient to yield 1.00 L of solution. The Ka of benzoic acid is 6.30 x 10-5 A. 5.20 B. 1.30 C. 7.00 D. 3.20 E. 4.20
Find the concentration (molarity) of an aqueous solution prepared by dissolving 10g of NaOH(s) in 100mL of water. Find the concentration (molarity) of a NaOH solution that contains 5g of NaOH and 1000 mL of water. What is the new concentration when we add 1L more of water to the prepared solution in question (2).? If you have 10 ml of a 5M solution of NaOH, how many mol of NaOH you have? How many mol of Na+ you have?...
An aqueous solution of ammonia is prepared (ammonia is weak base). How can we achieve the condition where [NH4+] = [NH3]? NH3 (aq) + H2O (l)-----OH– (aq) + NH4+(aq) A) By decreasing the pH. B) By increasing the pH. C) By heating the solution. D) By diluting the solution with water. E) By concentrating the solution.