";s:4:"text";s:2449:"An acid-base indicator is either a weak acid or weak base that exhibits a color change as the concentration of hydrogen (H +) or hydroxide (OH-) ions changes in an aqueous solution.Acid-base indicators are most often used in a titration to identify the endpoint of an acid-base reaction. The Arrhenius theory wouldn't count this as an acid-base reaction, despite the fact that it is producing the same product as when the two substances were in solution. That's silly! An acid-base reaction is a type of double displacement reaction that occurs between an acid and a base. The pH scale is used to measure how acidic or basic a solution is. Acid–base reaction - Acid–base reaction - Alternative definitions: Although the Brønsted–Lowry concept of acids and bases as donors and acceptors of protons is still the most generally accepted one, other definitions are often encountered. Acid/base reactions all have a lot in common, even though their effect (a colour change, leavened cake or ‘cooked’ fish) may look very different. Several concepts exist which provide alternative definitions for the reaction mechanisms involved and their application in solving related problems. It can be used to determine pH. The theory. In this post we’ll discuss the underlying science of these reaction types. The Bronsted-Lowry Theory of acids and bases. An acid is a proton (hydrogen ion) donor. An acid-base reaction is a chemical reaction that occurs between an acid and a base. An acid–base titration is a method of quantitative analysis for determining the concentration of an acid or base by exactly neutralizing it with a standard solution of base or acid having known concentration. Fill the canister with warm water and then quickly put the cap on and watch the acid-base reaction! For another reaction experiment, put an Alka-Seltzer tablet in the bottom of a clear plastic film canister (the kind where the cap fits inside instead of closing over the outside).