Question

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. why cant we use calcium hydrogen carbonate instead of calcium carbonate

Answer 1

$$\begin{gathered} MetalcompoundAreactswithHClgivingbriskeffervesence. \\ Thisgasextinguishesburningcandle.SoitscarbondioxidegasC{O}_2. \\ ThecompoundformedisgivenasCalciumchloride.Sothemetalcompoundforme \\ isCaC{O}_3. \\ CaC{O}_3+2HCl\to CaC{l}_2+\hspace{0.17em}{H}_{2}O+\hspace{0.17em}C{O}_2 \\ WecanuseCalciumbicarbonatealso. \\ Ca(HC{O}_3{)}_2+2HCl\to CaC{l}_2+\hspace{0.17em}2H_{2}O+\hspace{0.17em}2C{O}_2 \end{gathered}$$