1. Sodium hydroxide solution is a strong base. 7. Introduction. 3. Srong acids easily loose their concentration by decompostion and absorption of moisture from air. The purpose of this experiment is to determine the concentration of a solution of sodium hydroxide by titration against a standard solution of sodium hydroxide. The percent by mass of acetic acid in vinegar was calculated for titration 1 and 2. A standard solution has a concentration that is exactly known. In most titrations, solutions of the acid and the base are used. In determination of the amount of acid which is chemically equivalent to the amount of the base present, the equivalence point or end point is determined … The former is known as strong and the later as weak acid. Solid NaOH is very hygroscopic and contains many impurities. hydrochloric acid (HCl). pH < 7 indicate acidic solution, pH > 7 indicate basic solution and pH = 7 means neutral solution. Cautions: Hydrochloric acid solution is a strong acid. Hydrochloric acid is a monoprotic acid in that it produces one mole of hydrogen ions per mole of compound, we can simplify the formula to HA. This procedure is useful to find the concentration level of a concentrated solution of Hydrochloric Acid which perhaps is old and is not as strong as its original concentration marked on the commercial bottle. To determine the amount of base in an actual tablet, ideally you would dissolve it in water and titrate with acid. Joshua Farley CHEM 1251L- 10/30/ Introduction This experiment focused on an essential quantitative technique that, when used effectively, can determine the concentration of an acid in a solution. Both acid and base are strong, which not only makes determination of end point easy (steep part of the curve is long), but also means that calculation of titration curve and equivalence point are pretty straightforward. Determination of hydrochloric acid concentration is probably the most often discussed example of acid-base titration. Use the ___1___of base __2__the endpoint and the known concentration of the base solution to find the __3__of base used. Suppose you are titrating an acid solution with a base solution of known concentration. Result DiscussionsA titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution. The standard NaOH solution will be used to determine the purity of an impure solid acid and the standard HCl solution will be used for analyses later on in the semester. Introduction The purpose of this lab is to determine the concentration of hydrochloric acid (HCl) when titrated with a standardized sodium hydroxide (NaOH) solution, through means of the titration method. Both are harmful to skin and eyes. pH of any solution is defined as (–log H +) and has values between 0–14. 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