Chemistry
Give three distinct tests [apart from using an indicator] you would carry out with solution of HCl to illustrate the typical properties of an acid.
Hydrogen Chloride
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Answer
(i) Action on metals — Hydrochloric acid reacts with metals above hydrogen in the activity series forming metallic chlorides and evolving hydrogen.
Ca + 2HCl ⟶ CaCl2 + H2 ↑
(ii) Action on oxides — Hydrochloric acid reacts with oxides to form salt and water only.
CuO + 2HCl ⟶ CuCl2 + H2O
(iii) With salts of weaker acids — Hydrochloric acid decomposes salts of weaker acids.
Na2CO3 + 2HCl ⟶ 2NaCl + H2O + CO2 ↑
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Related Questions
The following questions pertain to the laboratory preparation of hydrogen chloride gas:
(i) Write the equation for it's preparation mentioning the condition required.
(ii) Name the drying agent used in the above preparation and give a reason for the choice.
(iii) State a safety precaution taken during the preparation of hydrochloric acid.
How will you prove that Hydrochloric acid contains
(i) hydrogen
(ii) chlorine.
Write equations for the reactions.
Convert:
(a) Two soluble metallic nitrates to insoluble metallic chlorides.
(b) Insoluble iron(II) oxide to a soluble compound.
(c) Insoluble metal carbonate to a soluble chloride.
(d) Metal sulphide to an offensive smelling gas.
Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E
