07 Exam Quiz M8 Exam ttpsoceaninstructurecomcourses13325qui

07 Exam . Quiz: M8. Exam ttps://ocean.instructure.com/courses/13325/quizzes/70364/take k, Work Visa Canada-...Internship Opportuni 97807506 77332.PDF EJ\'s Neat-O Stat . N- GA Question 6 In the following reaction HCOs laq)+ H200) fCOs (a)+ H3O (aq) HCO3. is an acid and H2O is its conjugate base. OHCO; is an acid and CO,2 is its conjugate base. OH,O is an acid and HCO, is its conjugate base. O HO is an acid and CO,2 is its conjugate base. O H,0 is an acid and COs is its conjugate base. D Question 7 4 pts What is the pH of a buffer that results when 33 g NaHCO, is mixed with 100.0 ml of 2.50 M NaOH and diluted with water to 250 mL?(K, for HCO-4.8 10 8/3p= (81)/ (5!)-(40320)/ (120)-336

Solution

HCO3-(aq) + H2O(l) ------------- CO3-2(aq)   + H3O+(aq)

HCO3- act as an acid because it donated one of the proton(H+) to the H2O and converts to CO3-2.

HCO3- act as an acid and its conjugate base is CO3-2.

H2O act as base and its conjugate acid is H3O+.

but in reverse direction

H3O+ acts as an acid and its conjugate base is H2O

CO3-s is a base and conjugage acid HCO3-.

so the answer is B.