Thursday, January 20, 2011

ACTIVITY 2 - Antacids

Write the formula for Tums?
CaCO3 (s) + 2 HCl (aq) ---> CaCl2 (aq) + H2O + CO2 (g)

How does Tums chemically react with water and stomach acid?
CO3-2+H+ ----> HCO3 + H+ ----> H2CO3 ----> H2O + CO2 = "sizzling" evolution of Gas
carbonate     bicarbonate            carbonic acid              carbon dioxide gas

The sizzling is the neutralize acid.

How many Tums are needed to neutralize a can of coke?
About 4 or 5 tums to neutralize the can of coke.

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