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Question
The following question is pertaining to the laboratory preparation of hydrogen chloride gas.
Write the equation for its preparation, mentioning the condition required.
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Solution
\[\ce{NaCl + H2SO4 ->[<200^\circ C] NaHSO4 + HCl ^}\]
Although it is a reversible reaction, it goes to completion as hydrogen chloride continuously escapes as a gas. The reaction proceeds until sodium sulphate forms when heated above 200°C.
\[\ce{NaHSO4 + NaCl ->[above 200^\circ C] Na2SO4 + HCl ^}\]
RELATED QUESTIONS
When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky.
When NH4OH solution is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH4OH solution.
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Two colourless gases which when mixed produce a white solid.
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How can you prove that hydrochloric acid contain :
Chlorine?
Hydrogen chloride gas is very soluble in water. It is dissolved in water to prepare hydrochloric acid by using an anti-suction device, as shown in the diagram. Very briefly explain, how this device prevents the suction of water into the flask, in which hydrogen chloride gas is produced.
Dilute hydrochloric acid is added in turn to a mixture of iron and sulphur and to the compound formed between iron and sulphur. Name the gas formed in each case.
Hydrogen chloride dissolves in water to form an acidic solution.
- Name the experiment which demonstrates that hydrogen chloride is very soluble in water.
- Give three distinct tests (apart from using an indicator) you would carry out with this solution to illustrate the typical properties of an acid.
Study the figure given below and answer that questions that follow:
(i) Identify the gas Y.
(ii) What property of gas Y does this experiment demonstrate?
(iii) Name another gas which has the same property and can be demonstrated through this experiment.
What property of hydrogen chloride is demonstrated when it is collected by downward delivery (Upward displacement)?
State the following:
The drying agent used in the laboratory preparation of HCl gas.
