Advertisements
Advertisements
प्रश्न
What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
Advertisements
उत्तर १
The chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
1. The aqueous solution of HCl is acidic in nature. It can turn blue litmus to red.
2. The aqueous solution of NH3 is basic in nature. It can turn red litmus to blue.
उत्तर २
In its pure liquid state, HCl is unionised and does not conduct electricity. However, in aqueous solution, HCl is a good conductor of electric current, as the H+ ion interacts with water to create [H3O+].
\[\ce{H \phantom{.}^{\bullet}_{\bullet}\overset{\bullet\bullet}{\underset{\bullet\bullet}{Cl}}^{\bullet}_{\bullet}->[H2O][ionisation]H+ + \phantom{.}^{\bullet}_{\bullet}\overset{\bullet\bullet}{\underset{\bullet\bullet}{Cl}}^{\bullet}_{\bullet}}\]
\[\ce{H+ + H2O -> [HO+]}\]
Similarly, In an aqueous solution, NH3 acts as a weak alkali and dissociates partially.
\[\ce{NH4OH <=> [NH4+] +[OH-]}\]
संबंधित प्रश्न
How is the following salt prepared:
Sodium nitrate from sodium hydroxide.
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCI, Fe, H2SO4, CI2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare iron (III) chloride.
State how would you prepare copper (II) oxide from
Copper nitrate
Define the following term:
Neutralisation
Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:
(i) Sodium sulphate
(ii) Copper sulphate
(iii) Iron (II) sulphate
(iv) Zinc carbonate
| Dilute sulphuric acid |
Copper, Iron, |
Copper carbonate, Sodium carbonate |
Write the equation for the following reaction:
Magnesium sulphate solution is mixed with barium chloride solution.
Name the method used for preparation of the following salts from the list given below:
(i) Sodium nitrate
(ii) Iron (III) chloride
(iii) Lead chloride
(iv) Zinc sulphate
(v) Sodium hydrogen sulphate
List :
(a) Simple displacement
(b) Neutralization
(c) Decomposition by acid
(d) Double decomposition
(e) Direct synthesis
For each of the salt: A, B, C and D, suggest a suitable method of its preparation.
A is a sodium salt.
Mention the colour changes observed when the following indicators are added:
| Solution | Acids | Alkalies |
| (a) Alkaline phenolphthalein solution | ||
| (b) Methyl orange solution | ||
| (c) Neutral litmus solution |
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCI, Fe, H2SO4, CI2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare sodium chloride.
