NCERT Solution for Class 10 Science Chapter 1
Chemical Reactions and Equations
Exercises Questions
Page No-16
Questions No-15
What do you mean by a precipitation reaction? Explain by giving examples.
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NCERT Solution for Class 10 Science Chapter 1
Chemical Reactions and Equations
Exercises Questions
Page No-16
Questions No-15
In a chemical reaction a insoluble substance (precipitate) is formed is called precipitation reaction.
eg.:
(i) AgNO3 + NaCl → AgCl + NaNO3
Silver Sodium Silver Sodium
nitrate Chloride Chloride nitrate
(ii) Na2SO4 + BaCl2 → BaSO4 + 2NaCl
Sodium Barium Barium Sodium
Sulphate Chloride Sulphate Chloride
(ppt)
Reactions in which precipitate is formed are called precipitation reactions. Generally in a precipitation reaction insoluble salts are settled down as precipitate.
Na2SO4(aq)+BaCl2(aq)→BaSO4s+2NaCl(aq)
In the above reaction, when sodium sulphate reacts with barium chloride, the white precipitate of barium sulphate is formed along with the sodium chloride.