Question

6. In an experiment, the molecular formula for calcium hydroxide was determined to be Ca(OH)2. In this experiment, 0.55 g of Ca (s) was added to 150 mL of DI water. After add- ing 10 drops of 0.1% thymol blue indicator, the solution was titrated with 0.30 M HCI. a) Write the balanced equation for the net ionic reaction that occurred during the titration. b) Calculate the volume of 0.30 M HCl required to reach the end point of the titration. c) If the initial reading of HCl in the burette was 25.60 ml, what was the final reading of HCl in the burette at the end point of the titration?

Answer 1

Cachlaa) t 2to) CaloMh (ag) +2HC1(9) 20H (aa) t 2t) 2M20) Spectatoo ong Net rowc Cart ave CI ca O.SS9 gog mar moles ot molgn mana mala Loltema a.O375ma O.ISOL O092 m )M l dota far aud hore tuhatn milliva of base (cale) millregreirg aut t aad (MC)) (voleme (m) xmoley xndaet bel(volcee m) Kmlng n osos) calohk ISO mLA O 092 mX2 volane o+ Me) x 0.30m x 92.0mL Uoleme 0f Mcl 2S 60 t92.0mL Pmal neadny 117.6mL