Complete the sentence. when an acid is added to water, hydronium ions a. increase b. decrease c. stay the same d. disappear

B. decrease

Explanation:

 Base  dissociate to give  out  OH-  ions

 In the other hand ,when  water (H2O)   dissociate it  give out hydronium ions ( H3O+)    and OH- ions

when  base  is added to  water  more OH-   it  led  to  addition of more Oh- ions  hence  H3O+ decrease.

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