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प्रश्न
State your observation of the following case:
When dilute hydrochloric acid is added to sodium carbonate crystals.
State one appropriate observation when dilute HCl is added to sodium carbonate crystals.
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उत्तर
Sodium carbonate crystals react with dilute HCl to form sodium chloride, water and carbon dioxide, which evolve with brisk effervescence. The result is a neutralisation reaction, as sodium carbonate is a basic salt, while hydrochloric acid is an acid.
\[\ce{Na2CO3 + 2HCl -> 2NaCl +H2O + CO2 ^}\]
संबंधित प्रश्न
Write balanced chemical equations to show how SO3 is converted to Sulphuric acid in the contact process.
Give balanced chemical equations for the action of sulphuric acid on the following:
Sulphur
In the contact process for the manufacture of sulphuric acid give the equations for the conversion of sulphur trioxide to sulphuric acid.
Distinguish between the given pairs of compounds using the test given within brackets:
Dilute sulphuric acid and dilute hydrochloric acid (using barium chloride solution)
Give reason for the following:
When concentrated sulphuric acid is added to sugar/glucose, a black mass is left behind.
Choose the current answer from the options given below :
When conc. H2SO4 comes in contact with sugar, it becomes black due to
Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Iron (II) sulphate from iron.
State one appropriate observation of the following:
Concentrated sulphuric acid is added dropwise to a crystal of hydrated copper sulphate.
Dilute hydrochloric acid and dilute sulphuric acid are both colourless solutions. How will the addition of barium chloride solution to each help to distinguish between the two?
Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid (using lead nitrate solution).
