During laboratory preparation of carbon(IV) oxide gas, dilute hydrochloric acid was added
to Substance L in a conical flask.
(a) Identify substance L.
(b) Write an equation that produces carbon(IV) oxide.
(c) State the observations made when the gas produced when bubbled through calcium hydroxide solution for a long time.

Answer:

a)- calcium carbonate

b)
-#CaCO_3(s)+2HCl(aq)rightarrow#
#CaCl_2(aq)+CO_2(g)+H_2O(l)#

c)
-White precipitate are formed which dissolve in excess to form colourless solution

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