Oxalic Acid Lab Report
Oxalic acid (H2C2O4.):
Oxalic acid is a colourless, toxic organic compound that is found naturally in plants, animals and in human beings. 16
It is also known as Ethanedioic acid or wood bleach. Oxalic acid is used to remove rust and stains in laundry as it converts most insoluble Fe compounds into soluble complex ions. It is also a constituent used to remove scale from automobile radiators.16
Oxalic acid has a molecular mass of 90.0349 g.mol-1. It is a strong acid and is in the carboxylic group. Although it is in the carboxylic group it is not as weak as the other carboxylic acids. Oxalic acid has 2 levels of ionisation as it is a diprotic acid. A diprotic acid is an acid that can donate 2 protons (H+ ions) per molecule to an aqueous solution. The ionisation reactions for oxalic acid are:
H_2 C_2 O_(4 (aq) ) ↔HC_2 O_(4 (aq))^(-1)+H_((aq))^+
HC_2 O_(4 (aq))^(-1) ↔ C_2 O_(4 (aq))^(-2)+ H_((aq))^+
The 1st ionization constant is 5,8 x 10-2 and the 2nd ionization constant is 6,5 x 10-5. Oxalic acid is both a Bronsted-Lowry and an Arrhenius acid. 10
It mainly exists as H2C2O4.2H2O, which is known as oxalic acid dihydrate. The 2H2O attached to the oxalic acid means that for every one molecule of Oxalic acid there is, there will be 2 molecules of water. This makes it predictable and allows for the standardization of NaOH. The reaction between NaOH and Oxalic acid dihydrate is as follows:
H2C2O4 .2H2O + 2NaOH → Na2C2O4 + 4H2O
This is a neutralization
Triphenylmethyl Bromide Lab Report
920 Words | 4 PagesThere was a strong odor similar to the smell of vinegar given off. After the solution was heated and the solid dissolved, 0.2 mL of hydrobromic acid was added to the test tube. The solution turned a bright yellow color after the hydrobromic acid was added. The solution was heated in a hot water bath for 5-10 minutes and then let cool. After heating, the
Unknown Compounds
1643 Words | 7 PagesOH- ions tend to make substances basic, and H+ ions make compounds more acidic1. Additionally, this pH test affirmed that sodium hydroxide and hydrochloric acid testing were not necessary in assessing the compound’s
Horseradish Peroxidase Lab Report
1090 Words | 5 PagesABSTRACT To catalyze a reaction, an enzyme will grab on (bind) to one or more reactant molecules. In this experiment we examined how increasing the volume of the extract added to the reaction would affect the rate of the reaction. The enzyme used was horseradish peroxidase which helps catalyze hydrogen peroxide. Using different pH levels, the absorbance rate of the reaction was measured to see at which condition the enzyme worked best. The rates of absorption were calculated using a spectrophotometer in 20 second intervals up to 120 seconds.
Chemical Equation For The Presence Of Sodium Bicarbonate
795 Words | 4 PagesIf I had a household product labeled sodium bicarbonate, I would add an acidic substance and expect bubble to be created. As we know acid reacts with bubbles when combined with sodium bicarbonate. 2. Write the chemical equation for the reaction in well A6. B BoldI ItalicsU Underline Bulleted list Numbered list Superscript Subscript3 Words NaOh + AgNO3>>>>NaNO3 + AgOH 3.
Chemical Change Lab Report
1679 Words | 7 PagesConsider the physical and chemical changes when you add hydrochloric acid to the sodium carbonate. Next, collect some hydrochloric acid (liquid, HCI) from the hydrochloric acid beaker and insert 5 to 8 drops of hydrochloric acid on the watch glass with Na2CO3. Finally, observe the changes of the substance from before and after. The second test that we were to observe were the changes of copper (II) sulphate (liquid, CuSO4) when added sodium carbonate (liquid, Na2CO3). Firstly is to add one dropper full of copper sulphate into one plastic cup.
Catechol Oxidase Lab Report
642 Words | 3 PagesThere are few vegetables and fruits that turns to the color brown if their surface is exposed to oxygen. Once the veggies or fruits been exposed to oxygen, then the browning begins to appear, and electrons and hydrogen will be removed. This happens because of an enzyme called catechol oxidase. The enzyme will act on its substrate catechol to form a yellow compound which then reacts with the oxygen in the air and change into benzoquinone. The more concentration of the enzyme, the more browning appears.
Acetylsalicylic Acid Synthesis Lab Report
704 Words | 3 PagesLab Report 5: Acetylsalicylic Acid (Aspirin) Synthesis Name: Divya Mehta Student #: 139006548 Date Conducted: November 19th 2014 Date Submitted: November 26th 2014 Partner’s Name: Kirsten Matthews Lab Section: Wednesday 2:30 L9 IAs Name: Brittany Doerr Procedure: For the procedure, see lab manual (CH110 Lab Manual, Fall 2014) pages 96-98. Wilfrid Laurier University Chemistry Department. Fall 2014. Acetylsalicylic Acid (Aspirin) Synthesis.
O-Vanillin Lab Report
840 Words | 4 PagesThe purpose of this experiment is to perform a two step reductive amination using o-vanillin with p-toluidine to synthesize an imine derivative. In this experiment, 0.386 g of o-vanillin and 0.276 g of p-toluidine were mixed into an Erlenmeyer flask. The o-vanillin turned from a green powder to orange layer as it mixed with p-toludine, which was originally a white solid. Ethanol was added as a solvent for this reaction. Sodium borohydride was added in slow portion as the reducing agent, dissolving the precipitate into a yellowish lime solution.
Respiration And Crayfish
146 Words | 1 PagesWhile CO2 is produced, the amount of CO2 produced is different depending on the organisms, in this case crayfish. To test the changes in pH, NaOH is used to neutralize the carbonic acid produced by the crayfish, by which the
Hydrochloric Acid Lab Report
876 Words | 4 PagesIt is secreted by the oxyntic cells in the gut which are found within the oxyntic glands of the stomach lining. The substance is colourless yet remarkably corrosive, and is therefore able to be the primary digester of food in an individual4. The liquid’s pH level is a highly dangerous, yielding 1, though it may vary slightly due to its molarity (# of molesliters of solution), but nevertheless is deemed a strong acid. When the two are combined, CO2 is released, and so the their rate of reaction may be measured by the pressure of the resulting gas5.
Stoichiometry And Limiting Reagents Lab Report
1237 Words | 5 PagesVerna Wang Hannah Palmer CHEM 101-069 Lab 11-19-16 Stoichiometry and Limiting Reagents Lab Report Purpose: We are using the reaction of sodium hydroxide and calcium chloride to illustrate stoichiometry by demonstrating proportions needed to cause a reaction to take place. Background: Just like a recipe would call for a specific amount of one ingredient to a specific amount of another, stoichiometry is the same exact method for calculating moles in a chemical reaction. Sometimes, we may not have enough of or too much of one ingredient , which would be defined as limiting and excess reagent, respectively.
Hydrogen Peroxide Temperature Lab Report
838 Words | 4 PagesEffect of Yeast on Temperature on Hydrogen Peroxide Solution in Water Khalid Al Sabeeh Ms. Dobrin 11-G Chemistry HL Jan 5, 2015 Abstract: Within this lab yeast was added to hydrogen peroxide solution in water. Temperature was the factor to be tested. In all trials, the initial and final, when yeast was added temperatures increased by 10˚C respectfully per trial.
Determination Of Ethanoic Acid In Vinegar Lab Report
1489 Words | 6 PagesAli Atwi : Internal assesment – calculating of the concentration of ethanoic acid in vinegar AIM : To calculate the concentration of ethanoic acid CH3COOH in vinegar using stoichiometric equations, ( Yamaha brand ) Introduction : I personally like to add a little bit of vinegar on my food because it makes it taste better, yet I know that vinegar contains acid, and I also know the consequences of highly concentrated acid intake, like severe itching and stomach ache, vomiting. Venigar contains a small percentage of ethanoic acid Ch3COOH. This practical aims to find out the concentration of the of the vinegar against a standard solution of sodium hydroxide soloution of concentration 0.1 mol dm3 through acid-base titration, the label on the bottle says 6%.
Lab Report On Acid Base Titration
1346 Words | 6 PagesStrong acids and strong bases are strong electrolytes and are assumed to ionize completely in the presence of water. Weak acids however, only ionize to a limited extend in water. Any weak or strong acids when in contact with any weak or strong alkali will start to undergo neutralization regardless of their volume. When an indicator which is present in the acid-base mixture and have experienced colour change, it indicates that the mixture is in right proportions to neutralize each other and is also known as the equivalence point.
Benzoic Acid Lab Report
767 Words | 4 PagesAbstract The unknown concentration of benzoic acid used when titrated with standardized 0.1031M NaOH and the solubility was calculated at two different temperatures (20◦C and 30◦C). With the aid of the Van’t Hoff equation, the enthalpy of solution of benzoic acid at those temperatures was determined as 10.82 KJ. This compares well with the value of 10.27KJ found in the literature.
More about Oxalic Acid Lab Report
Triphenylmethyl Bromide Lab Report
920 Words | 4 PagesUnknown Compounds
1643 Words | 7 PagesHorseradish Peroxidase Lab Report
1090 Words | 5 PagesChemical Equation For The Presence Of Sodium Bicarbonate
795 Words | 4 PagesChemical Change Lab Report
1679 Words | 7 PagesCatechol Oxidase Lab Report
642 Words | 3 PagesAcetylsalicylic Acid Synthesis Lab Report
704 Words | 3 PagesO-Vanillin Lab Report
840 Words | 4 PagesRespiration And Crayfish
146 Words | 1 PagesHydrochloric Acid Lab Report
876 Words | 4 PagesStoichiometry And Limiting Reagents Lab Report
1237 Words | 5 PagesHydrogen Peroxide Temperature Lab Report
838 Words | 4 PagesDetermination Of Ethanoic Acid In Vinegar Lab Report
1489 Words | 6 PagesLab Report On Acid Base Titration
1346 Words | 6 PagesBenzoic Acid Lab Report
767 Words | 4 Pages