Which of the following is an example of an arrhenius base? kcl ca(oh)2 hcl

An Arrhenius base is a substance that when dissolved in an aqueous solution, increases the concentration of hydroxide (-OH) in the solution.  When Ca(OH)2 dissolves in water: Ca(OH)2 ⇒ Ca2- + 2OH-, thus increases the concentration of OH, so Ca(OH)2 is an Arrhenius base.  KCl⇒K+ + Cl-, HCl⇒H+ +Cl-, they both don't increase -OH concentration, so they are not Arrhenius base.  In fact HCl is an Arrhenius acid.

The total number of electrons is 14

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