which of these equations correctly expresses the self - ionization of water?\no (h_2o + h_3o^+leftrightarrow…

which of these equations correctly expresses the self - ionization of water?\no (h_2o + h_3o^+leftrightarrow h_2o+oh^-)\no (h_2o + h_2oleftrightarrow2oh^-)\no (h_2o + h_2oleftrightarrow2h_3o^+)\no (h_2o + h_2oleftrightarrow h_3o^++oh^-)
Answer
Brief Explanations:
In the self - ionization of water, one water molecule donates a proton ($H^+$) to another water molecule. The donating water molecule becomes a hydroxide ion ($OH^-$) and the accepting water molecule becomes a hydronium ion ($H_3O^+$).
Answer:
$H_2O + H_2O \rightleftharpoons H_3O^+ + OH^-$ (the last option)