Equilibrium, Acid & Bases reaction question. Answers are highlighted, I just don

Question

Equilibrium, Acid & Bases reaction question. Answers are highlighted, I just don't understand how we arrived to the answer in question 9. Can somebody please clarify it? [8] Which of the following is true for the following reaction. The equilibrium constant is approximately 10^-6 The equilibrium constant is approximately 10^6 The equilibrium constant is approximately 10^-16 The equilibrium constant is approximately 10^16 The equilibrium constant is approximately 1 [9] Which is the most predominant form of the species shown in the box at pH 7. [Hint: consider your answer to the previous question] I II III IV The species in the box

Explanation / Answer

8.Keq = 10^11/10^5 = 10^6

9.at pH 7 species is nuetral

so charges will be balanced in the spieces

so answer is B II

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