Chemistry
Take sodium sulphate solution in a test tube and add barium chloride solution to it dropwise.
(a) What do you observe?
(b) Why is the reaction fast?
(c) Which type of reaction is it?
Answer
(a) A white precipitate of barium sulphate is formed immediately.
Na2SO4 + BaCl2 → BaSO4↓ + 2NaCl
(b) The reaction is fast because both sodium sulphate and barium chloride are in aqueous solution, so their ions are already free and can react immediately.
(c) It is a double displacement reaction. More specifically, it is a precipitation reaction.
Related Questions
What type of reaction is respiration ? Explain.
Discuss some decomposition reactions occurring inside our body.
NaCl + AgNO3 ⟶ AgCl + NaNO3
(a) What will you observe in the above chemical change?
(b) Why is this reaction known as a double displacement reaction?
(c) Which reagent can be used to test the chloride radical?
K, Na, Ca, Mg, Al, Zn, Fe, Pb, Cu, H, Hg, Ag
Pick an element from the reactivity series given above and write the equations for the the following:
(a) Metal hydroxide on heating forms metal oxide and water vapour.
(b) Metal hydroxide on heating forms metal, oxygen and water vapours.
(c) Metal nitrate decomposes to give two products only.
(d) Metal nitrate on heating forms metal oxide, nitrogen dioxide and oxygen.
(e) Metal nitrate on heating forms metal, nitrogen dioxide and oxygen.
(f) Metal carbonate which is stable to heat.
(g) Metal carbonate which forms metal oxide and carbon dioxide on heating.
(h) The heating effect on bivalent metal hydrogen carbonate.