11. What is the pOH of a solution in whichIOH] -4.47 x 10 A. 9.93 B. 5.53 M? C.
ID: 1026663 • Letter: 1
Question
11. What is the pOH of a solution in whichIOH] -4.47 x 10 A. 9.93 B. 5.53 M? C. 4.35 D. 4.07 12. What is the pOH of a solution that is 2.1 x 102 M in Na(OH)? A. 12.32 B. 1.38 C. 1.68 D. 12.62 13. The Ka of weak acid is 4.8 x 10 s, what is the pH of a 0.58 M solution of this acid? A. 0.24 B. 11.72 C. 13.76 D. 2.28 14. What is the Kb of the formate ion, HCOO IRKa of HCOOH 1.8x10*? A. 5.6 x 1011 B. 1.8 x 108 C. 7.5 x 10 D. 1.8 x 1010 15. Which of the following is a strong acid and an oxoacid? A. H3PO B. HCIO2 C. HNO D. NO 16. Which of the following salts will produce a basic solution when dissolved in water? A. NaCI B. Na2NO2 C. NH NO D. Ca2NOExplanation / Answer
Ans 11 : C) 4.35
pOH is the negative logarithm of hydroxide concentration in the solution.
So here :
pOH = -log [OH-]
= -log (4.47 x 10-5)
= 4.35
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