Given the reaction at equilibrium: C_2H_3O_2^-(aq) + H_2S(aq) leftrightarrow HS^

Question

Given the reaction at equilibrium: C_2H_3O_2^-(aq) + H_2S(aq) leftrightarrow HS^-(aq) + HC_2H_3O_2 (aq) Which pair represents the Bronsted-Lowry bases in this reaction? A) C_2H_3O_2^- (aq) and H_2S (aq) B) C_2H_3O_2^- (aq) and HS^-(aq) C) H_2S(aq) and HC_2H_3O_2 (aq) D) HS^- (aq) and HC_2H_3O_2 (aq) Which statement correctly describes a solution with a pH of 9? A) It has a higher concentration of H_3O^+ than OH^- and causes litmus to turn blue. B) It has a higher concentration of OH^- thanH_3O^+ and causes litmus to turn blue. C) It has a higher concentration of H_3O^+ than OH^- and causes methyl orange to turn yellow. D) It has a higher concentration of OH^- than H_3O^+ and causes methyl orange to turn red. A radioactive isotope used in the study of many organic reaction mechanisms is A) carbon-12 B) carbon-14 C) oxygen-16 D) oxygen-18 Which radioisotope is used to treat thyroid disorders? A) Co-60 B) I-131 C) C-14 D) U-238 A radioisotope which is sometimes used by doctors to pinpoint a brain tumor is A) carbon-12 B) lcad-206 C) technetium-99 D) uranium-238 Gas samples A, B. and C are contained in a system at STP, The partial pressure of sample A is 38.0 kPa and the partial pressure of sample B is 19.0 kPa. What is the partial pressure of sample C? A) 19.0 kPa B) 38.0 kPa C) 44.3 kPa D) 63.3 kPa A 300.0mL portion of H_2O is added to 300.0 ml. of 0.250 M H_2SO_4. What is the new molarity? Write a net ionic equation for the reaction of Pb(NO_3)_2(aq) with K_2S(aq). Calculate the mass/volume percent composition, or %(m/V), of 3.00 times I0^2 mL of solution containing 15.0 g of glucose Calculate the freezing point of a 3.00 m aqueous solution of CaCl_2.

Explanation / Answer

70) among the given options option B) represents the conjugate bases.

71) Option B) is correct as the litmus change indicates the base formation.

72) Oxygen-18 generally ussed to find the mechanism of organic reactions.

73) I-131 can be used for the treatment othyroid glad related diseases.

74) Option C)

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