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प्रश्न
How many salts can be obtained from ortho phosphoric acid? Is there any difference in the salts formed by the acid?
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उत्तर
Ortho phosphoric acid is H3PO4 i.e; a tribasic acid has three replaceable hydrogen atoms so it forms three series of salts, namely two acid salts and a normal salt, with NaOH as:
NaOH + H3PO4 → NaH2PO4 + H2O
Acid salt
( Monosodium hydrogen salt )
2NaOH + H3PO4 → Na2HPO4 + 2H2O
Acid salt
( Disodium hydrogen phosphate )
3NaOH + H3PO4 → Na3PO4 + 3H2O
Normal salt
( Sodium Phosphate )
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संबंधित प्रश्न
How is the following salt prepared:
Lead (II) oxide from lead.
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Sodium nitrate from sodium hydroxide.
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[List : A. Neutralization B. Precipitation C. Direct combination D. Substitution ]
(i) Lead chloride
(ii) Iron (II) sulphate
(iii) Sodium nitrate
(iv) Iron (III) chloride
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(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 laboratory preparation of sodium sulphate using dilute sulphuric acid.
The preparation of lead sulphate from lead carbonate is a two step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate)
What is the first step that is required to prepare lead sulphate from lead carbonate?
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Magnesium sulphate solution is mixed with barium chloride solution.
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.
