CH3ONa
R-O or O-H bonds aren't basic enough
The methoxide ion would steal a hydrogen ion from water, forming sodium hydroxide and methanol. CH3ONa + H2O --> CH3OH + NaOH
NaOH + CH3OH --> CH3ONa + H2O Evaporate the solution to dryness, add more CH3OH and evaporate to dryness. you can repeat a few times to ensure the remaining solid is sodium methoxide
This substance is an acid.
sodium sulfide is apparently made by generating hydrogen sulfide gas into a sodium hydroxide solution,and then adding an equivalent alkali. you would get sodium sulfide if you added an equivalent alkali to the solution.