Question

A compound X is bitter in taste.It is a component of washing powder and reacts with dilute HCl to produce brisk effervescence due to colorless , odorless gas Y which turns lime water milky due to formation of Z. If excess of Y is passed, the milkiness disappears due to formation of P. IdentifyX,Y,Z and P.

Answer 1

1) X is Sodium Carbonate(Na2CO3).

2)Y is CO2 gas.

3)Z is calcium carbonate.

4)P is calcium hydrogen carbonate.

the balanced equation:

Ca(OH)2+CO2---------->H2O+CaCO3

CaCO3 +CO2+H2O------------->Ca(HCO3)2

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Answer 2

X is Sodium Carbonate ( Na$_{2}$CO$_{3}$ ) which is a component of washing powder with a bitter taste .

Y is Carbon dioxide ( CO$_{2}$ ) gas .

Z is Calcium carbonate ( CaCO$_{3}$ ) . Its solution is milky .

P is Calcium hydrogen carbonate [ Ca(HCO$_{3}$)$_{2}$ ] .

The balanced chemical equations are as follows -

Na$_{2}$CO$_{3}$ + HCl  →  NaCl + H$_{2}$O + CO$_{2}$

Ca(OH)$_{2}$ + CO$_{2}$  →  H$_{2}$O + CaCO$_{3}$

CaCO$_{3}$ + CO$_{2}$ + H$_{2}$O  →  Ca(HCO$_{3}$)$_{2}$