Question
Explain clearly how conc, $H_2SO_4$ is used as dehydrating as well as drying agent.

Answer

Conc. sulphuric acid is hygroscopic in nature and can remove moisture from other substances; therefore, it is used as a drying agent.
It is also used as a dehydrating agent because it has a strong affinity for water and thus absorbs water quickly from compounds.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

When excess lead nitrate solution was added to a solution of sodium sulphate$, 15.1g$ of lead sulphate was precipitated. What mass of sodium sulphate was present in the original solution?
$Na_2SO_4 + Pb(NO_3)_2 \rightarrow PbSO_4 + 2NaNO_3$
$(H = 1, C = 12, O = 16, Na = 23, S = 32, Pb = 207)$
When an ammonium salt is warmed with sodium hydroxide solution, ammonia gas is evolved. State three ways by which you can identify this gas.
Explain Why?
"The number of atoms in a certain volume of hydrogen is twice the number of atoms in the same volume of helium at the same temperature and pressure."
Describe the change you would observe :
(i) When concentrated sulphuric acid is added to sugar.
(ii) When concentrated sulphuric acid is added to formic acid (HCOOH), and warmed.
(iii) When burning magnesium is introduced into a gas jar containing sulphur dioxide. Name the products formed and write an equation for the reaction.
Convert:
Methane into chloroform
You are provided with the list of chemicals below in the box:
Image
Using suitable chemicals from the list given below, write balanced chemical equations for the preparation of the salts mentioned below:
(i) Lead carbonate
(ii) Ammonium sulphate
The following is a sketch of an electrolytic cell used in the extraction of aluminium :

(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be co ntinuously replaced?
Name the products formed and write an equation when ethyne is added to the following in an inert solvent:
Bromine
Name the products formed and give appropriate chemical equations for the Ethanol oxidized by acidified potassium dichromate ?
Each of the two flasks contains $2.0 g$ of gas at the same temperature and pressure. One flask contains oxygen and the other hydrogen. Which sample contains the greater number of molecules?