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प्रश्न
Explain why dilute hydrochloric acid cannot be concentrated by boiling beyond 22.2%.
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उत्तर
Distillation slowly increases the strength of a weak hydrochloric acid solution until it has 22.2% HCl by weight and boils at 110°C. Once this level is reached, boiling cannot be used to make the acid stronger anymore. When this concentration is attained, boiling [constant boiling mixture or azeotrope] cannot be used to enhance the acid concentration any further.
Water and HCl are the main components of vapours that form before 110°C, although HCl molecules make up the majority of vapours that form above this temperature.
संबंधित प्रश्न
Name the gas that is produced in the given cases :
An action of dilute hydrochloride acid on sodium sulphide.
Give a chemical test to distinguish between the given pairs of chemicals:
Sodium chloride solution and Sodium nitrate solution
Write an equation for the reaction of hydrochloric acid on zinc carbonate.
Write an equation for the reaction of aqueous hydrochloric acid on lead nitrate solution.
How will the action of dilute hydrochloric acid enable you to distinguish between sodium carbonate and sodium sulphite?
Name the following:
A chemical in which gold can be dissolved.
Name the following:
A metallic oxide which reacts with hydrochloric acid to give a coloured solution.
How will you identify?
An amphoteric hydroxide
Write observation:
A small piece of zinc is added to dilute hydrochloric acid.
Write an equation for the reaction of hydrochloric acid on manganese (IV) oxide.
