ZnCO3 (s) + H+ (aq) > Zn+ (aq) + H2O(L) + CO2(g)
(ii) Why excess zinc carbonate is used?
To ensure that the Hydrochloric Acid and Zinc Carbonate is completely reacted.
(iii) Briefly explain how the zinc chloride crystals can be obtained.
We filter to remove the excess unreacted Zinc Carbonate solid. Evaporate the solution to remove the water and make a saturated salt solution. The hot saturated solution form Zinc Chloride crystals when it is cooled.
2 comments:
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