Same question for strong and weak bases. Vaneswwei, University of California at Santa Cruz Here are some very simple guidelines to classify compounds as strong or weak acids and bases. Apply them with caution and as always, common sense and experimental evidence prevails. There are very few strong acids in aqueous solution. If the compound is an acid, and it is not on this list, you are usually safe in assuming it's a weak acid in water.
Strong bases are also very rare.
If you have a base that is not one of these in water, you can tentatively assume that it's a weak base. Sign up for a free monthly newsletter describing updates, new features, and changes on this site.