Advertisements
Advertisements
प्रश्न
Name the procedure used to prepare a sodium salt such as sodium sulphate.
Answer the following question related to salts and their preparations:
Name the procedure used to prepare a sodium salt such as sodium sulphate.
Advertisements
उत्तर १
The name of the procedure used to prepare a sodium salt such as sodium sulphate is Neutralization of acid with base.
उत्तर २
By neutralising alkali with acid. Pour the calculated 25 cm3 of NaOH into the flask. Using a pipette, add a few drops of phenolphthalein to it.
\[\ce{2NaOH + H2SO4 -> Na2SO4 + 2H2O}\]
Fill the burette with dil. H2SO4 upto zero mark from the burette add dil.H2SO4 drop by drop into the flask with constant stirring until pink colour just disappears. Transfer contents of flask to evaporating dish to evaporate water. On cooling crystals of [Na2SO4.10 H2O] are obtained.
\[\ce{Na2SO4 + 10H2O -> Na2SO4.10H2O}\]
संबंधित प्रश्न
Distinguish between the given pairs of compounds using the test given within brackets:
A lead salt and a zinc salt (using excess ammonium hydroxide)
How is the following salt prepared:
Calcium sulphate from calcium carbonate,
How is the following salt prepared:
Sodium nitrate from sodium hydroxide.
Give the preparation of the salt given in the left column by matching with the methods given in the right column. Write balanced equations for each preparation.
| Salt | Method of Preparation |
| Zinc sulphate | Precipitation |
| Ferrous sulphide | Displacement |
| Barium sulphate | Neutralization |
| Sodium sulphate | Synthesis |
Give equation to prepare the following as directed
PbCO3 from Pb(NO3)
From the list of the substances given, name the substances which you would use to prepare each of the following salts:
List of substances: Copper, lead, sodium, zinc, copper oxide, lead carbonate, sodium carbonate solution, dilute hydrochloric acid, dilute nitric acid and dilute sulphuric acid.
Salts: (a) zinc sulphate (b) copper sulphate (c) sodium sulphate (d) lead sulphate.
Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (II) sulphide
Fill in the blanks with suitable words:
An acid is a compound which when dissolved in water forms hydronium ions as the only ______ ions. A base is a compound which is soluble in water and contains ______ ions. A base reacts with an acid to form a ______ and water only. This type of reaction is known as ______.
Explain why Anhydrous FeCl3 cannot be prepared by heating hydrated iron (III) chloride.
Select the word/s given which are required to correctly complete the blanks.
If a piece of magnesium was put into a solution M, ______ gas would be evolved.
