Acids generally have an excess of ions in solution, while bases usually have an excess of ions in solution.
h3o+ ions; oh− ions
oh− ions; h3o+ ions
both h3o+ and oh−; only oh−
only h3o+ ; both h3o+ and oh−

The answer to your question is:

Explanation:

Acids generally have an excess of _H₃O⁺ ions in solution, while bases usually have an excess of __OH⁻ ions in solution.

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answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.