Question
Download Solution PDFThe temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y. X and Y, respectively, are:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The temporary hardness is caused by bicarbonates of calcium and magnesium. On boiling following changes occurs,
On boiling, the bicarbonates salt of magnesium Mg(HCO3)2, the solution produces the magnesium hydroxide to decompose and yielding carbon dioxide and hydrogen.
\({\rm{Mg}}{\left( {{\rm{HC}}{{\rm{O}}_3}} \right)_2}\left( {{\rm{aq}}} \right)\mathop \to \limits^{{\rm{\;boiling\;}}} {\rm{Mg}}{({\rm{OH}})_2} + {\rm{C}}{{\rm{O}}_2} \uparrow + {{\rm{H}}_2} \downarrow \)
Calcium hydrogen carbonate on boiling will produce calcium carbonate with carbon dioxide and hydrogen.
\({\rm{Ca}}{\left( {{\rm{HC}}{{\rm{O}}_3}} \right)_2}\left( {{\rm{aq}}} \right)\mathop \to \limits^{{\rm{\;boiling\;}}} {\rm{CaC}}{{\rm{O}}_3}{\rm{\;}} + {\rm{C}}{{\rm{O}}_2} \uparrow + {{\rm{H}}_2} \downarrow \)
X = Mg(HCO3)2
Y = Mg(OH)2Last updated on May 23, 2025
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