What are stoichiometric equations for the reaction of (i) zinc carbonate with sulfuric acid; (ii) calcium oxide with water; and (iii) calcium hydroxide with carbon dioxide?

Answer 1

#ZnCO_3(s) + H_2SO_4(aq) rarr ZnSO_4(aq) + CO_2(g) + H_2O(l)#

#CaO(s) + H_2O(l) rarr Ca(OH)_2(aq)#

#Ca(OH)_2(aq) + CO_2(g) rarr CaCO_3(s) + H_2O(l)#

Carbon dioxide is known to turn limewater (#Ca(OH)_2(aq)#, sparingly soluble in water) milky due to #CaCO_3# precipitation.

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Answer 2

Peyton Adams

(i) Zinc carbonate with sulfuric acid: ZnCO3(s) + H2SO4(aq) -> ZnSO4(aq) + CO2(g) + H2O(l) (ii) Calcium oxide with water: CaO(s) + H2O(l) -> Ca(OH)2(aq) (iii) Calcium hydroxide with carbon dioxide: Ca(OH)2(aq) + CO2(g) -> CaCO3(s) + H2O(l)

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.