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18 Nov 2019
A buffer contains 050 mol NH^+_4 and 0.50 mol NH_3 diluted with water to 1.0 L. How many moles of NaOH are required to increase the pH of the buffer to 10.00^+ (pk_a of NH^+_4 = 9.25) a. 0.035 mol b. 0.15 mol c. 0.35 mol d. 0.41 mol e. 2.8 mol Which of the following conditions metal the equivalence point of the titration of a monophonic weak base with a strong acid? 1. The moles of acid added from the buret equals the initial moles of weak base. The volume of acid added from the buffer must equal the volume of base titrated. 3 The pH of the solution is less than 7.00 a. 1 only b 2 only c. 3 only d. 1 and 3 e. 2 AND 3 A volume of 25.0 ml of 0.100M CaH_3CO0_2H(aq) is titrated with 0.1000 M NaOH(aq). What is the pH after the additions of 12.5 mL of NaOH? (K_a of benzoic acid = 63 times 10^-5) a. 2.00 b. 4.20 c. 5.40 d. 7.00 e. 8.60
A buffer contains 050 mol NH^+_4 and 0.50 mol NH_3 diluted with water to 1.0 L. How many moles of NaOH are required to increase the pH of the buffer to 10.00^+ (pk_a of NH^+_4 = 9.25) a. 0.035 mol b. 0.15 mol c. 0.35 mol d. 0.41 mol e. 2.8 mol Which of the following conditions metal the equivalence point of the titration of a monophonic weak base with a strong acid? 1. The moles of acid added from the buret equals the initial moles of weak base. The volume of acid added from the buffer must equal the volume of base titrated. 3 The pH of the solution is less than 7.00 a. 1 only b 2 only c. 3 only d. 1 and 3 e. 2 AND 3 A volume of 25.0 ml of 0.100M CaH_3CO0_2H(aq) is titrated with 0.1000 M NaOH(aq). What is the pH after the additions of 12.5 mL of NaOH? (K_a of benzoic acid = 63 times 10^-5) a. 2.00 b. 4.20 c. 5.40 d. 7.00 e. 8.60
Jean KeelingLv2
17 Apr 2019