Test 1 : Soln P contains either Al3+ or Pb2+ or Mg2+ or Mn2+ or
Zn2+.
Test 2 : Solns P and Q contain either Ba2+ or Pb2+.
Test 3 : Solns A, P, Q contain either (ranked in
increasingly insolublility) Ca2+ > Cd2+ > Zn2+ >
{Mn2+,Ni2+,Fe2+,Cu2+} > {As2+,Sb2+,Pb2+} > Hg2+.
Test 4 : Soln Q contains the Ba2+ ion. (if bright yellow
ppt, then Pb2+ ion).
Hello.
I performed the following tests and require to find out which
metal ions were present in each solution.
Test 1: Add 10 drops of Solution A to a test tube. Add 10 drops
of ammonia to Solution A and then shake. This test was then
repeated with Solution P, Q & R.
Solution A: No visible change.
Solution P: White ppt formed.
Solution Q: No visible change.
Solution R: No visible change.
Test 2: Add 10 drops of Solution A to a test tube. Add 10 drops
of sulfuric acid to Solution A and then shake. This test was then
repeated with Solution P, Q & R.
Solution A: No visible change.
Solution P: White ppt formed.
Solution Q: White ppt formed.
Solution R: No visible change.
Test 3: Add 10 drops of Solution A to a test tube. Add 10 drops
of sodiumethanedioate to Solution A. Then add a small amount of
HCl, but not to more than half the test tube. This test was then
repeated with Solution P, Q & R.
Solution A: White ppt formed with sodiumethanedioate, then
colourless solution after adding HCl.
Solution P: White ppt formed with sodiumethanedioate, then
colourless solution after adding HCl.
Solution Q: White ppt formed with sodiumethanedioate, then
colourless solution after adding HCl
Solution R: Yellow solution.
Test 4: Add 10 drops of Solution A to a test tube. Add 10 drops
potassium dichromate to test tube This test was then repeated with
Solution P, Q & R.
All turned to a yellow solution, expect for Solution Q which
formed a pale yellow ppt.