Titration Of Sodium Hydroxide Solution

Words: 3879
Pages: 16
Open Document
Titration is a technique of slowly adding either an acid to a base or base to acid, until the equivalence point is reached. At the equivalence point, the number of moles of the titrant added corresponds to the number of moles of the substance being titrated. The titration technique is used to carry out a chemical reaction between two solutions by the controlled addition from a burette of one solution to the other, allowing measurements to be made throughout (Anne Marie, 2014). In order to observe the equivalence point, an indicator must be added to one of the solutions. The colour of the solution will change in colour depending on the type of indicator and the nature of solution. For example, Phenolphthalein is pink in a basic solution and …show more content…
Investigative question: How will the volume of Oxalic acid affect the concentration of the Sodium Hydroxide?
Hypothesis: A large volume of Oxalic acid will neutralise 20ml of Sodium Hydroxide.
Dependant Variable: Concentration of 20ml Sodium Hydroxide solution.
C_NaOH=n/V
Therefore, [NaOH] is directly proportional to it number of moles, and inversely proportional to its volume.
Independent Variable: Average volume of Oxalic Acid solution titrated against the 20ml Sodium Hydroxide solution.
Controlled Variables: The volume of Sodium Hydroxide solution; only 20ml of Sodium Hydroxide was neutralized in each of the three titration trials. Only De-ionized water was used to make the solutions and rinse the equipment. The temperature of the water and the solutions was neither increased nor decreased (temperatures were at room temperature).
Apparatus:
1 50ml burette 1 Electronic scale
1 Glass funnel 3 Erlenmeyer Flasks
2 250ml Volumetric Flasks 1 Suction …show more content…
Label the solution: Sodium Hydroxide

Prepare the titration

Place another clean funnel into the 100ml burette and pour the Oxalic acid solution through the funnel and into the burette. Make sure the bottom of the meniscus reaches the mark that reads: 0ml. Rinse the pipette with deionised water and use it to draw 10ml of sodium hydroxide solution. Release the solution into a clean Erlenmeyer flask, labelled “A”. Draw another 10ml of Sodium Hydroxide and release it into the same Erlenmeyer flask to make up 20ml of Sodium Hydroxide solution. Add 4 drops of Phenolphthalein indicator into the Sodium Hydroxide solution. The solution should change from colourless to dark pink, showing that Sodium Hydroxide is a base. Place the pink Erlenmeyer flask under a standing burette and on a white piece of paper. Open the Burette tap to release the oxalic acid solution and begin the acid-base titration. Swirl the pink Erlenmeyer flask after every 3 drops of oxalic acid to increase the rate of reaction. The colour should change from dark pink to light
Show More

Related Documents: Titration Of Sodium Hydroxide Solution

Standardizing A Solution Of Sodium Hydroxide

AP Chemistry Standardizing a Solution of Sodium Hydroxide PURPOSE: To determine the concentration of sodium hydroxide. OBJECTIVES: ● ∙ Prepare an aqueous solution of sodium hydroxide to a target molar concentration. ● ∙ Determine the concentration of your NaOH solution by titrating it with a solution of potassium hydrogen phthalate, abbreviated KHP, of precise molar concentration. MATERIALS: LabPro or CBL 2 interface solid sodium hydroxide computer or handheld…

Words 655 - Pages 3

Physics: Sodium Hydroxide and Commercial Vinegar Essay

Titration of Vinegar Problem: To find out if the strength of a product is the same as what a company claims it to be, E.g. ethanoic acid in vinegar, or alcohol in wine. Select a Problem: I chose to figure out if the product Idun vinegar contains 7% ethanoic acid which is what they claim it to be. There are a number of ways to do so; this includes combining the vinegar with an alkali of known concentration, with an indicator to show when it has been neutralised, from this data you can calculate…

Words 2154 - Pages 9

Essay about acid base titration 1

Acid Based Titration Objective The concentration of sodium hydroxide was determined by standardizing potassium hydrogen phthalate (KHP) in an acid based titration experiment using the following equation: OH-(aq) + HP-(aq) → H2O(l) + P2-(aq) Experimental Procedure A solution containing 1 L of 0.05 M sodium hydroxide was prepared using a 1 L volumetric flask and 6 M sodium hydroxide. A small amount of the prepared solution was poured into a 50 mL buret in order to rinse the buret. The buret…

Words 459 - Pages 2

Essay on Investigation of the Suitability of Indicators and Instrumental Detection of Equivalence Points in Acid-Base Titrations

points of acid-base titrations. To obtain titration curves some acid-base titrations. Materials and method: As shown in page 2 and 3 in General Chemistry practical manual 2011. Result: Part 1: Suitability of Indicators Strong acid-weak base titration Table I: Volume Titration Rough Accurate 1 Accurate 2 Final volume 0.00 14.65 0.00 Initial volume 35.20 48.00 33.50 Volume of ammonium hydroxide used (ml) 35.00 33.35 33.50 Average volume of ammonium hydroxide used (ml) (33…

Words 1833 - Pages 8

Glorimetric Analysis Lab

were then reweighed with the Vitamin C and recorded. The titration apparatus was then set up by placing the 50 mL buret in the buret clamp on the support stand. The 250 mL beakers were then labeled discarded solutions. 100 mL Sodium Hydroxide (NaOH) was obtained on a clean 150 mL beaker. The concentration of the Sodium Hydroxide (NaOH) was carefully recorded. The buret was then rinsed using the following procedure. 5-10 mL of NaOH solution was added to the buret…

Words 490 - Pages 2

To Determine the Percentage by Mass of Calcium Carbonate in Eggshells Essay

determine the percentage of calcium carbonate in eggshells. In this experiment, back titration is used. First, excess acid is reacted with the calcium carbonate in eggshells: 2HCl(aq) + CaCO3(s) → CaCl2(aq) + H2O(l)+ CO2(g) Later, if we can find out the number of mole of unreacted acid, number of mole of calcium carbonate can…

Words 1066 - Pages 5

Essay on Week 5 iLab Report

iLab, Week #5 UNKNOWN ACID AND BASE TITRATION Introduction The purpose of this lab is to determine the concentration of a hydrochloric acid solution using acid-base titration. When the base was added to the acid, the indicator in the acid turned the solution pink when the end point of titration was reached. Procedure Part I: Measuring pH Step 1: Measure pH of 0.1 M hydrochloric acid 1) Select Equipment from the toolbar 2) Select a 100 mL beaker 3) Add 50 mL of 0.1 M hydrochloric acid to the…

Words 814 - Pages 4

Essay on Acid Base Titration Lab

LAB REPORT Kim Hoff Damien Guilband Noah Jabusch 03/09/15 ­ 3/10/2015 Acid­Base Titration Lab INTRODUCTION : The purpose of this acid­base titration lab was to determine the molar concentration of two acid solutions by performing titrations with a strong base, NaOH, of known concentration. The pH of the solution was monitored and graphed with a pH meter over the course of each titration. The pH graph was used to find the equivalence points of both reactions, allowing the calculation of…

Words 1497 - Pages 6

Unknown Acid Stoichiometry

The experiment purpose was to determine the identity of an unknown acid. This was accomplished by preparing diluted sodium hydroxide and titrating the unknown acid to determine its molar mass. Stoichiometry was used to convert the titration amount of 16.35-16.8ml to liters and multiply this by the molarity of the respective sodium hydroxide solution and a HA:NaOH ratio. This process was repeated 3 times to calculate a value for the number of protons donated, either mono, di, or tri. With this ratio…

Words 220 - Pages 1

Chemlab Week 5 Essay

AND BASE TITRATION Introduction I found the purpose of this experiment to be use a acid-base titration to determine the concentration of a hydrochloric acid. During this experiment, I came to a summary that acid-base titrations are great to learn about the nature and the solutions of an acid and a base. When the acid and base came together, an equal point was noticed. I was able to find this with the indicator from when it changed colors. That told me it was the end point of the titration. When…

Words 610 - Pages 3