When excess carbon (IV) oxide is passed into lime water; the turbidity produced initially disappears due to the formation of
Source: JAMB · 2024
When excess carbon (IV) oxide is passed into lime water; the turbidity produced initially disappears due to the formation of
Explanation
At first, CO₂ reacts with lime water (calcium hydroxide) to form insoluble calcium trioxocarbonate(IV), which makes the water turn milky: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O.
With excess CO₂, the milkiness clears. The CaCO₃ reacts with more CO₂ and water to form soluble calcium hydrogentrioxocarbonate(IV): CaCO₃ + H₂O + CO₂ → Ca(HCO₃)₂.
Calcium oxide and calcium carbide are not formed in this reaction.
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