(B, o0, M-pli.iol O10Mp\"-101 267, 391, sms ser? A) What is the conecentration o
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Question
(B, o0, M-pli.iol O10Mp"-101 267, 391, sms ser? A) What is the conecentration of hydroxide ion in a blood A) 6.08 10 M (O 964-10.M () 2.51-10 'M (D) 3.98-10M 17. Caleulate the ptt afher 40.0 ml ot o 5oo M to 150.0 ml.of O.100 M HPOs W 12. A titration of citric acid (pA-3.o8; p4.74, pK 5.40) with NaOH is performed. What is the plt of the (A) 5.07 ( 4.74 (C) 3.91 (D) 3.08 13. The titration of 50.0 mL ofa 0.0340 M diprotic acid with pK-7.20, pKs-12.35) (A) 1.85() 4.68 first equivalence point? 63 0.100 M NaOH is shown below. Estimate each of the K. values of the diprotic acid. 18. Which statement is the correct mass an aqueous solution of Na Cop Es Including activity, calculate the [H'1 in a pH-11.94. TH.-086 (A) 1.3x104 M (C) 1.3x10-12 M 19. (B) 11x10M (D) 1.0@aM 0s10 15 20 25 30 35 40 Volume Titrant (mL) 20. Estimate the concentration of the analyte the titrant concentration is 0.100 M and the oris volume of analyte solution is 25.0 mL being (A) Kal-1.0×10-5,Ka2=1.6x10-9 (B) K,i-6, 1 x 1 0 , Ka-2.3x1 0-7 (C) Kai 3.2, K-6.6 (D) K,l=5.0,Ke-8.8 In which solution will FePO4 be most soluble? 10- a. 6 14. (B) H2O (D) 0.20 M KCI (A) 0.30 M FeCl (C) 0.10 M KCI 10 15 Volume titrant (mL) At what pH will the predominant form of ascorbic acid (vitamin C) have a negative two charge? . (A) 0.0950 M (C) 0.0430 M HO pKal 4.17 oLpk 11.57 HO 21. A calibrated micropipette delive Two aliquots deliver what total (A) (C) HO OH 100.02 ± 0.01 L 100.02 ±0.12 L (A) 12.50 (B) 11.57 (C) 7.00 (D) 3.50
Explanation / Answer
12. C
as it is the titration of strong base vs triprotic acid and first two Ka values are more than third value.
so, the pH will be = 0.5 (pKa1 + pKa2)
13. B
14. B
15. B
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