1a. Of the following anions used in this experment (CI^- , CO3^(2-) , I^- , OH^-

Question

1a. Of the following anions used in this experment (CI^- , CO3^(2-) , I^- , OH^- , NO3^- and SO4^(2-) which would form a precipitate with Ba^(2+)? Write balanced net ionic equation(s) for these reaction(s)

b. Of the following cations used in this experiment (Ca^(2+) , Cu^(2+) , K^+ , Na^+ and Pb^(2+) which would form a precipitate with S^(-)? Write balanced net ionic wquation(s) for these reaction(s)

2. Identify all the compounds that acted as acids and bases from the following reactions below?

A: CaCI2 and Na2CO3

B:KI and Na2SO4

C:HCI and Mg(s)

D:CuSO4 and NaOH

E:HCI and Na2CO3

F:Pb(NO3)2 and KI

G:HCI and NaOH

H:Pb(NO3)2 and Na2SO4

I: HCI and Cu(s)

J:CuSO4 and Fe(s)

K:HCI and NH3

L:KI and Br2

On the basis of result, would it be expected that a reaction occures between aqueous solutions of NaOH and NH3? if so, Write a balanced net ionic equation for this reaction.

3. The activity of halogens decreases as follows: F2> CI2 > Br2 > I2. Base on the results of reaction of KI and Br2, which reaction below will produce chlorine gas (CI2)?

2CI^-  + Br2  ---> CI2+2Br^-          or         2CI^- +F2  ---> CI2 + 2F^-

Explanation / Answer

) a) Ba^+2 +CO^-2 ............> BaCO3

1b)     Ca^+2 + S^-2 ................> CaS

           Cu^+2 +S^-2 .................> CuS

2)A) CaCl2 is acid Na2CO3 is base

   B)KI acid & Na2SO4 is base

   C) HCl Acid & Mg is base

   D) CuSO4 acid & NaOH base

E:HCI acid and Na2CO3 base

F:Pb(NO3)2 base and KI acid

G:HCI acid and NaOHbase

H:Pb(NO3)2 acid and Na2SO4 base

I: HCI acid and Cu(s)base

J:CuSO4 acid and Fe(s) base

K:HCI acid and NH3base

L:KI acid and Br2base

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