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Question
Explain, why (or give reasons for)
In the preparation chloride from sodium chloride, the gas can be obtained below 200°C or above. But the lower temperature is preferred.
Solution
Lower temperature is preferred because at higher temperature sodium sulphate forms a hard crust and sticks to the bottom of the flask and is difficult to remove.
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RELATED QUESTIONS
Certain blank spaces are left in the following table and these are labelled as A, B, C, D
and E. Identify each of them
| Lab preparation of | Reactants used | Products formed | Drying Agent | Method of collection |
|
| 1 | HCl gas | NaCl + H2SO4 |  |
conc. H2SO4 |  |
| 2 | NH3 gas |
|
Mg(OH)2 NH3 |
 |
 |
The following are pertaining to the laboratory preparation of hydrogen chloride gas.
Write the equation for its preparation mentioning the condition required.
The following are pertaining to the laboratory preparation of hydrogen chloride gas.
Name the drying agent used and justify your choice.
Explain why when the stopper of a bottle full of hydrogen chloride gas is opened, there are fumes in the air.
Explain why thick white fumes are formed when a glass rod dipped in \[\ce{NH4OH}\] is brought near the mouth of a bottle full of \[\ce{HCl}\] gas.
Explain why dry hydrogen chloride gas does not affect a dry strip of blue litmus paper but it turns red in the presence of a drop of water.
Name the gas produced when chlorine water is exposed to sunlight.
How will you prove that the gas prepared is HCI?
What are the important precautions?
Explain, why (or give reasons for)
HCI gas does not conduct electricity, but hydrochloric acid conducts electricity.
What property of hydrogen chloride is demonstrated when it is collected by downward delivery (upward displacement) ?
Hydrogen chloride gas, being highly soluble in water, is dried by ______.
One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state 'no visible reaction'.
Sodium chloride solution and sodium nitrate solution.
Give one test to distinguish between the following pair of chemicals.
Sodium nitrate solution and sodium chloride solution.
Answer the following question related to the laboratory preparation of the hydrogen chloride gas:
Write the chemical equation.
State a relevant reason for the following:
Hydrogen chloride gas cannot be dried over quick lime.
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{NH4OH + HCl ->}\]
