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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
Explain hydronium ion. Write the ionization of sulphuric acid showing the formation of hydronium ion.
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 |
State how would you prepare copper (II) oxide from
Copper Carbonate
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.
Define the following term:
Neutralisation
Write the balanced equation for the preparation of the following compounds, starting from iron and using other substance: Iron (II) chloride
The diagram given below is to prepare iron (III) chloride in the laboratory.
(i) What is substance B?
(ii) What is the purpose of B?
(iii)Why is iron (III) chloride to be stored in a closed container?
(iv) Write the equation for the reaction between iron and chloride ?
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 ______.
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:
Sodium sulphate.
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 sulphate.
