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
Define catalyst.
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
What is a chemical change? Give two examples of chemical change?
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Galvanization is a process in which ______ is coated as a layer of iron.
Is the conversion of milk into ice cream a chemical change?
