Respuesta :

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Answer: hydrogen

All acids have the hydrogen ion in common

Explanation:

According to Arrhenius theory, an acid is a substance which dissociate in water to produce hydrogen ions, H+;

For example: HCl --> H+ + Cl-

while a base is a substance which gives hydroxide ions, OH-, in water

For example: NaOH(s) --> Na+(aq) + OH-(aq)

Thus, all acids have the hydrogen ion in common