Advertisements
Advertisements
Question
Distinguish by a chemical test sodium hydroxide solution and ammonium hydroxide solution.
Advertisements
Solution 1
These salts can be distinguished by using metal cations like calcium. When we add calcium salt to sodium hydroxide and ammonium hydroxide, then a white curdy ppt. is formed only in the case of sodium hydroxide.
Solution 2
With sodium hydroxide solution Ca(NO3)2 sol. gives a fine, milky white precipitate of Ca(OH)2 which is insoluble in excess of NaOH.
\[\ce{Ca[NO3] + 2NaOH -> \underset{milky white ppt}{2NaNO3} + Ca[OH]2\downarrow}\]
Whereas ammonium hydroxide solution with calcium nitrate solution Ca[NO3]2 has no reaction.
APPEARS IN
RELATED QUESTIONS
From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating, this salt gives a yellow residue when hot and white when cold
Give one word or a phrase:
The property by which certain hydrated salts, when left exposed to atmosphere, lose their water of crystallization and crumble into powder.
Which of the following salt has a blue colour and why?
CuSO4.5H2O or CuSO4
When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process?
You are asked to prepare hard water in your laboratory. Select a group from the following groups of salts, any salt of which you may dissolve in distilled water to obtain hard water.
(A) NaCl; Na2SO4; KCl
(B) NaCl; CaCl2; KCl
(C) CaCl2; CaSO4; MgSO4
(D) Na2SO4; CaSO4; MgSO4
Copy and complete the following table which refers to the action of heat on some carbonates:
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate | |
| Lead carbonate | |
| Copper carbonate |
Distinguish by a chemical test sodium chloride and sodium sulphide.
Sodium carbonate is a basic salt because it is a salt of a ____________.
How is normal salt obtained? Give a suitable reaction.
An aqueous solution of a salt turns blue litmus to red. The salt could be the one obtained by the reaction of ______.
