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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.
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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.
\[\ce{Na2SO4 + 10H2O -> Na2SO4.10H2O}\]
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संबंधित प्रश्न
How is the following salt prepared:
Calcium sulphate from calcium carbonate,
The following is a list of methods for the preparation of salts.
A – direct combination of two elements
B – reaction of a dilute acid with a metal.
C – reaction of a dilute acid with an insoluble base.
D – titration of a dilute acid with a solution of soluble base.
E – reaction of two solutions of salts to form a precipitate.
Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:
Anhydrous ferric chloride.
Give the preparation of the salt shown in the left column by matching with the methods given in the right column. Write a balanced equation for each preparation.
| Salt | Method of preparation |
| Zinc Sulphate | Precipitation |
| Ferrous sulphide | Oxidation |
| Barium Sulphate | Displacement |
| Ferric sulphate | Neutralisation |
| Sodium sulphate | Synthesis |
Explain hydronium ion. Write the ionization of sulphuric acid showing the formation of hydronium ion.
State how would you prepare copper (II) oxide from
Copper Carbonate
Write the balanced equation for the preparation of the following compounds, starting from iron and using other substance: Iron (II) chloride
Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (II) sulphate
What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
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 ______.
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 (II) sulphate.
