I think OldCurmudgeon and StaxMan are equally appropriate but here is 1 sentence response with easy example for you. Note: Though at this stage we have a tendency to think about all metallic hydroxides as that contains hydroxide ions, it is actually a simplification - but it really works OK! https://propertyingurugram.in/residential/anant-raj-the-estate-residences-sector-63a-gurgaon/