Activity 1.9 Ncert Science class 10
Displacement reaction by an iron nail in a copper sulphate solution.
Chemical reactions and equations
Give an example of a double displacement reaction other than the one given in Activity 1.10
Double Displacement Reaction example
A. Silver nitrate reaction sodium chloride
AgNO3(aq) + NaCl(aq) ——> AgCl(s) + NaNO3(aq)
Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
Copper sulphate crystal is blue in colour. So it is also called “Blue Vitriol” (Hindi: नीला थोथा). It is used in refining industries and agriculture. When it is dissolved in water it forms blue solution.
Iron metal reacts with copper sulphate and displaces copper.
Write the balanced equation for the following chemical reactions.
Balance
A. Hydrogen + Chlorine ——> Hydrogen chloride
B. Barium chloride + Aluminium sulphate —–> Barium sulphate + Aluminium chloride
C. Sodium + water ——> Sodium hydroxide + Hydrogen