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Chewing and swallowing inexpensive OTC calcium carbonate tablets can help relieve symptoms of stomach upset due to acid reflux (heartburn).

Which of the following is the CORRECT net ionic equation that can explain its effectiveness?

A

${CaCO }_{ 3 }(s)\space +\space 2HCl(aq)\space \longrightarrow \space {CaCl }_{ 2 }(aq)\space +\space { H }_{ 2 }O(l)\space +\space C{ O }_{ 2 }(g)$

B

${{ CO }_{ 3 }}^{ 2- }(aq)\space +\space 2{ H }^{ + }(aq)\space \longrightarrow \space { H }_{ 2 }O(l)\space +\space C{ O }_{ 2 }(g)$

C

${CaCO }_{ 3 }(s)\space +\space 2{ H }^{ + }(aq)\space \longrightarrow \space { Ca }^{ 2+ }(aq)\space +\space { H }_{ 2 }O(l)\space +\space C{ O }_{ 2 }(g)$

D

${{ HCO }_{ 3 }}^{ - }(aq)\space +\space { H }^{ + }(aq)\space \longrightarrow \space { H }_{ 2 }O(l)\space +\space C{ O }_{ 2 }(g)$

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