( ( ( ( ( ( Bases ( in water ) ) ( also ( separate ( into ions ) ) ) ) , ) and ) ( ( the ( negative ion ) ) ( ( is hydroxide ) ( -LRB- ( ( OH - ) -RRB- ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NNS Bases)) (PP (IN in) (NP (NN water)))) (ADVP (RB also)) (VP (VBP separate) (PP (IN into) (NP (NNS ions))))) (, ,) (CC and) (S (NP (DT the) (JJ negative) (NN ion)) (VP (VBZ is) (ADJP (JJ hydroxide)) (PRN (-LRB- -LRB-) (FRAG (ADVP (RB OH)) (: -)) (-RRB- -RRB-)))) (. .)))
Bases in water also separate into ions, and the negative ion is hydroxide (OH-).
(ROOT (S (NP (NNS Bases)) (VP (VBP are) (NP (NP (DT the) (JJ ionic) (NNS compounds)) (SBAR (WHNP (WDT that)) (S (VP (VBP produce) (NP (JJ negative) (NN hydroxide) (NNS ions)) (SBAR (WHADVP (WRB when)) (S (VP (VBN dissolved) (PP (IN in) (NP (NN water))))))))))) (. .)))