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Z- is a weak base. An aqueous solution of NaZ is prepared by dissolving 0.550 mol...
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
QUESTION 2 Z is a weak base. An aqueous solution of Na2 is prepared by dissolving 0.350 mol of Naz in sufficient water to yield 2.0L of solution. The pH of the solution was 893 at 250°C The Koof is 9.510 1210-5 2110-10 4-10-10
10) The pH of a solution prepared by dissolving 0.550 mol of solid methylamine hydrochloride (CH3NH3Cl) in 1.00 L of 1.35 M methylamine (CH3NH2) is Kb for methylamine is 4.40 x 10-4. (Assume the final volume is 1.00 L.) The A) 11.03 B) 2.97 C) 3.75 D) 10.64 E) 10.25 11) A 25.0 mL sample of 0.723 M HCIO4 is titrated with a 0.27 M KOH solution. The H30+ concentration after the addition of 80.0 ml of KOH is M....
QUESTION 31 A solution was made by dissolving 26.5g of Na2CO3 in 500.0 mL of water. What is the molality of this solution? (1.0g of water -1.0 ml of water) 11 Na23.6C128016 OA 0.25 m OB. 0.25 M OC 0.5M OD 0.5 m E. None of above QUESTION 32 Molarity (M) of a solution varies with O A Pressure O Temperature OC Partial pressure D. Both A and B OE. Both A and C QUESTION 33 Which of the following...
1) The pH of an aqueous solution of 0.442 M caffeine (a weak base with the formula C8H10N4O2) is ______ 2) The hydroxide ion concentration, [OH-], of an aqueous solution of 0.442 M diethylamine (a weak base with the formula (C2H5)2NH) , Kb = 6.9×10-4, is: [OH-] = ________ M.
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...
Please answer all the questions #1. HA is a weak acid. an aqueous solution of HA was prepared by dissolving 0.185 mol of HA and diluted to 525mL. The pH of solution was 3.93 at 25.0°C. The Ka of HA is _____. #2. What is the pH of a solution at 25°C with[H^+] = 2.50 • 10^-5?
8.- An aqueous solution is prepared dissolving 10.000 g of compound Z (MW-200.0) in 200.0 mL of solution. If 16.0 mL of that solution are added to 84.0 mL of water, the final molarity is a) 0.0800 M b) 0.0200 M c) 0.0100 M d) 0.0400 M
13) A 0.0035 M aqueous solution of a particular compound has pOH 11.54. The compound is a) a weak base b) a weak acid c) a strong base a strong acid e) a salt 14) In basic solution, a) [H30'> [OH] b) [H30 ]- [OH1 [Hs0)< [OH] d) (OH]<7.00 e) [OH] =OM 15) The pH of a 0.63 M aqueous solution of hypobromous acid, HBro, at 25°C is 4.17. What is the value of K for HBro? a2.0 x 10...