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The main reactive chemicals are magnesium carbonate and/or magnesium hydroxide.

Both react with excess stomach acid, to neutralise the acid.

Excess stomach acid is evidenced by 'reflux'(heart burn), where the contents of the stomach momentarily bubble up to the throat.

The stomach normally digests food in a pH evironment of '1'(one). This occurs naturally by the stomach walls secreting hydrochloric acid (HCl) into the stomach. That horrible burning sensation on reflux is the hydrochloric acid.

So the reaction schemes to settlethe stomach are

MgCO3 + 2HCl = MgCl2 + H2O + CO2 (burp!!!!)

Mg(OH)2 + 2HCl = MgCl2 + 2H2O

Notice in both cases the salt magnesium chloride is produced and water. Hence dlluting the stomach contents.

Eating too much food and particularly fatty food, makes the stomach work harder, to produce more hydrochloric acid, hence with an overful stomach you may suffer with reflux.

Eating acidic fruit , Oranges, apples strawberries etc., aids the digestion by supplementing the hydrochloric acid content; 'common ion effect'.

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lenpollock

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6mo ago

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