13. copper(ii) chloride and silver acetate acid/base:
14. hydrofluoric acid and barium hydroxide
15. magnesium hydroxide and hydrochloric acid
16. lithium hydroxide and acetic acid
17. sulfuric acid and sodium hydroxide
18. sodium carbonate and nitric acid
19. sodium bicarbonate and sulfuric acid
20. zirconium(iv) hydroxide and phosphoric acid
21. sodium sulfite and hydrofluoric acid
22. sodium sulfite and hydrochloric acid
23. sodium sulfide and hydrochloric acid
24. ammonium chloride and sodium hydroxide

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.