For example, drain cleaners and oven cleaners ... Your stomach contains hydrochloric acid, and too much of this causes indigestion. Indigestion (or antacid) tablets contain alkalis such as ...

Zinc and iron also react with hydrochloric acid. Magnesium, zinc and iron also react with sulfuric acid. The products are a salt (in this case a sulfate) and hydrogen. For example: ...

A cotton swab is dipped into concentrated hydrochloric acid (producing hydrogen chloride gas) while a second on is dipped into concentrated aqueous ammonia (producing ammonia gas). Both cotton swabs ...