Advertisements
Advertisements
प्रश्न
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Advertisements
उत्तर
The reaction between dil. sulphuric acid and sodium sulphite occurs in two steps and is a double replacement reaction.
In the first step, sulphuric acid reacts with sodium sulphide to give sodium sulphate and sulphurous acid.
\[\ce{H2SO4 + Na2SO3 -> Na2SO4 + H2SO3}\]
In the second step, sulphurous acid, which is highly unstable decomposes spontaneously into sulphur dioxide and water.
\[\ce{H2SO3 -> SO2 + H2O}\]
Thus, the overall reaction is written as:
\[\ce{H2SO4 + NaSO3 ->Na2SO4 + SO2 ++ H2O}\]
APPEARS IN
संबंधित प्रश्न
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
What are chemical reactions?
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Explain the following reaction with one suitable example of Decomposition reaction
State the conditions necessary for a chemical change or reaction.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Are these changes chemical in nature?
Explain how the painting of an iron gate prevents it from rusting.
What is the difference between reactants and products?
