Concept explainers
(a)
Interpretation:
It should be explained whether same observations will be made if Ca(OH)2 is replaced by CaCl2 in lime water test for CO2.
Concept introduction:
Lime water test involved with following reaction series.
When the solution become acidic:
(b)
Interpretation:
It should be showed that the white precipitate will re-dissolve in 0.005 M Ca(OH)2 solution but not in a saturated solution.
Concept introduction:
In both 0.005 M solution Ca(OH)2 and saturated solution Ca(OH)2 there is a complete ionization.
The H2CO3 dissociate as follows:
According to Le Chatelier’s Principle, if any change in temperature, pressure, volume or concentration in the system takes place at equilibrium, a new equilibrium will establish to counteract the change.
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EBK GENERAL CHEMISTRY
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