Question

f. Place about 2 mL of iron (III) chloride solution, FeCl3(aq), in a test tube. Add about 10 drops of potassium thiocyanate solution, KSCN(aq). Observe any changes. Place a small amount of solid sodium bicarbonate, NaHCO3. also known as baking soda) in the bottom of a dry test tube. Cover the bottom to a depth of about 1 em. Quickly pour in about 2 mL of acetic acid, HC2H309. Observe any changes. There are really two reactions occurring here, one after the other. The first reaction is a double replacement, and the second a decomposition of carbonic acid to carbon dioxide and water. h. Add about 2 mL of barium chloride solution, BaCl(aq), to a clean test tube. Add about 10 drops of sodium phosphate solution, Na3PO4. Observe the results.

Answer 1

0 It is a double replacement Reaction Reactants: Feels, KCN. observation Red colouration is formed. Balamad eguation Fod. +3K SON → Fe CCN)3 SK - (aq) (aq) (aq) (aq) However this reaction will go further to from K3[Fe (SCN)] Complex as shown below." Fedz +6KSCN Kg [Fe (SCN)6 +3kcl. . (aq) (aq) a (aq) (aq). Red colour comples O Reactants NaHCOQ (sodium bricobonate), CH₃COH (Actic Acid). 6 It is a 1st under goes double replacement. observation Nahcoz solid dissolves in Aatic Acid Balanced equation • NaHCO3 CH₃COONa+ HCO3 H + A I Then Hocou undergoes decomposition to by evoluation of CO2 gas. observation cooluation of coagos bubbles from the reaction mixture. Balanced equation. H9C03®) > Hoa+ C0943) . overall reaction CH₃COH + NaHCO3 CH₃COONa+ CO₂ + H₂O - (aq) (9)

It is a double replacement reaction. Reactants : Baca (Barium chloride), Sodium phosphate care observation, white colour a colour less precipitate a Ba, poul, formed. Balamad equation 3 Bacle (ag)+2ą poy -> Gnaclat Bą poyl|