Activity 1-20-11 Antacids

Write the formula for Tums?  How does Tums chemically react with water and stomach acids?
Tums- CaCO3  --->     Ca +2  + CO3  -2   (insoluble compound in H2O)
Calcite
limestone
chalk
How many Tums are needed to neutralize a can of coke?
about 3-5 tablets of tums to neutralize a can of coke.