Of the acids in the table below, _____ is the strongest acid. A) HCHO_2 B) HCIO
ID: 525368 • Letter: O
Question
Of the acids in the table below, _____ is the strongest acid. A) HCHO_2 B) HCIO C) HOAc and HCHO_2 D) HOAc E) HF The equilibrium constant for the gas phase reaction 2SO_2(g) + O_2(t) 2SO_3(g) is K_ep = 2.80 times 10^2 at 999 K. At equilibrium, _____. A) products predominate B) only reactants are present C) only products are present D) roughly equal amounts of products and reactants are present E) react ants predominate On the phase diagram shown above, the coordinate of point _____ correspond to the critical temperature and pressure. A) A B) B C) C D) D E) EExplanation / Answer
Solution:- (42) Highest is the value of Ka, stronger is the acid. Looking at the Ka values for the given acids, the highest Ka value is for HF(Ka = 6.8 x 10-4), so the strongest acid is HF and the correct choice is E.
(43) we know that, Keq = [products]/[reactants]
if product concentrations are higher than reactant concentrations then Keq is also high. Given value of Keq is greater than 1 means the products predonimante. choice A is correct.
(44) In phase diagram, the point at which liquid and gas phases of a substance are indistinguishable from each other is known as critical point. At this point, both liquid and gas phases merge together. In given diagram, point B is the critical point. So, correct choice is B.
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