Advertisements
Advertisements
प्रश्न
Identify the cation of the following case:
NH4OH solution when added to solution (B) gives white ppt. which does not dissolve in excess.
Advertisements
उत्तर
Pb2+ ion :
\[\ce{Pb(NO3)2 + 2NH4OH -> \underset{\text{(chalky white ppt. insoluble in excess)}}{Pb(OH)2 + 2NH4NO3}}\]
APPEARS IN
संबंधित प्रश्न
On adding dilute ammonia solution to a colourless solution of a salt, a white gelatinous precipitate appears. This precipitate however dissolves on addition of excess of ammonia solution. Identify (choose from Na, Al, Zn, Pb, Fe)
Which metal salt solution was used?
Name the metal hydroxides which are soluble in ammonium hydroxide solution.
Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution.Describe the effect of Adding ammonium hydroxide to each portion in turn till it is in excess.
How would you distinguish between Zn2+ and Pb2+ ions, using ammonium hydroxide solution?
Write the observation, and balanced equation for the following reaction:
Ammonium hydroxide is added first in a small quantity, and then in excess, to a solution of copper sulphate.
State what do you observe when ammonium hydroxide to Iron (III) sulphate solution.
Write the observation for the following:
NaOH is added drop-wise till in excess to a solution of zinc sulphate.
The following table shows the tests a student performed on four different aqueous solutions which are X,Y,Z and W. Based on the observations provided, Identify the cation present
|
Chemical Test |
Observation | Conclusion |
| To Solution X, ammonium hydroxide is added in minium quantity first and then in excess | A dirty white precipitate is formed which dissolves in excess to form a clear solution | (i) |
| To Solution Y, ammonium hydroxide is added in minimum quantity first and then in excess | A pale blue precipitate is formed which dissolves in excess to form a clear inky blue solution | (ii) |
| To solution W, A small quantity of sodium hydroxide solution is added and then in excess | A white precipitate is formed which remains insoluble | (iii) |
| To a salt Z, calcium hydroxide solution is added and then heated | A pungent smelling gas turning moist red litmus paper blue is obtained | (iv) |
Write a balanced equation:
Copper sulphate solution with ammonium hydroxide solution.
The metal hydroxide which reacts with both acids and alkalis to form salt and water is ______.
