PURPOSEThe purpose of this experiment is to use our knowledge from previous experiments to determine the exact concentration of a 0.1 M sodium hydroxide solution by titration (Guide laboratory guide page 141).QUESTIONThe question that arose was proposed for the investigation was: Is it possible to determine the exact concentration of the 0.1 M sodium hydroxide solution by titration (Laboratory Guide page 141)? BASIC DISCUSSION For this experiment we used titration to standardize the exact concentration of NaOH. Titration is the process of carefully adding a solution from a burette to another substance in a flask until all of the substance in the flask has reacted. Standardization is the process of determining the concentration of solutions. When a solution has been standardized it is called a standard solution. To know when a solution is at its endpoint, an indicator is added to the acidic solution. An indicator is an organic dye that is added to an acidic solution. The indicator is one color in the acidic solution and another color in the basic solutions. An endpoint occurs when the organic dye changes color to indicate that the reaction is finished (Lab Guide page 141). Example Calculations Three different equations were used in this experiment: stoichiometry of the titration reaction, conversion from mL to L, and calculation of the molarity of NaOH and HCl (Lab Guide pages 142 and 143). Stoichiometry of the titration reaction: H_3 O^+ (aq)+〖OH〗^- (aq)→2H_2 O (l)Conversion from mL to L: (_ ^V)NaOH=(24.42 ml)(1 l/1000 ml)= 〖2.442 ×10〗^(-2) L(_^V)HCl=(25.00 ml)(1 l/1000 ml)= 〖2,500×10〗^( -2) LCalculate the molarity of NaOH and HCl: (_ ^M)NaOH=(((_^M)HCL)((_^V)HCl,L))/(((_^V)NaOH,L) )PROCEDURE(Attached)STUDENT REPORTDATA SHEET(Attached )DATA ANALYSISHYPOTHESIS: I hypothesize that by titrating a known quantity of a substance in a solution, I can use the data from the experiment to calculate how many moles of the solution at known concentration had to react completely with the titrant and therefore use the formula C=n/V (in liters) to calculate the molarity of NaOH.OBSERVATIONS:In this experiment the sodium hydroxide solution went through three different phases in which its quality and quantity changed. The first step was called I. Preparation: about 0.1 M NaOH, 1000 ml of clear distilled water was boiled and then cooled to room temperature.