Documents about Sodium Carbonate

  • 1 Pages

    Lab report for experiment 7

    Ole Miss, CHEM 105

    Excerpt: ... Patrick Smith Chemistry 115 Section 3 Identification of "UM-1" Using Empirical Formula 30 October 2006 Kyle McCool Dear Mr. TA, In today's experiment we studied the reactions in aqueous solutions, including metathesis reactions and net ionic equations. We concocted a series of mixtures and observed their reactions and recorded the ionic equations. In the first mixture we mixed Copper (II) sulfate and sodium carbonate . It went from clear to blue in color and became very cloudy. A precipitate was formed. In the second mixture, Copper (II) sulfate and barium chloride was mixed. It went from crystal clear to a milky white color. A precipitate was also formed. In the third mixture, copper (II) sulfate and sodium phosphate was mixed. It went from a clear to a pale blue. It was semi cloudy and a precipitate was also formed. In the fourth mixture, sodium carbonate and sulfuric acid were combined. It stayed the same color but started to bubble. There was no evidence of a precipitate. In the fifth mixture, sodium carbo ...

  • 1 Pages

    lab 2 conclusion

    Ill. Chicago, CHEM 112

    Excerpt: ... Conclusion The purpose of this experiment was to identify what takes place when sodium carbonate is added to hydrochloric acid. The experiment was based mostly upon finding the ration of the mass of the sodium carbonate and the volume of the hydrochloric acid. The experiment wasn't as much of a success as I would have hoped, however, the mass to volume ration did increase exponentially. Error occurred when adding too much sodium carbonate . It was tough to judge how much was actually needed. The experiment resulted in easily observable chemical reactions between the sodium carbonate and the hydrochloric acid. ...

  • 3 Pages

    lab4

    Nashville State Community College, CHE 101

    Excerpt: ... Chemistry 101 Lab 4: Solution stoichiometry Objective: Apply stoichiometry and the idea of a limiting reactant to a reaction in solution Skills: -Write a recipe for making a given volume, given concentration solution -Make a given volume, given concentration solution from such a recipe -Use a Buchner funnel and vacuum filtration to isolate a precipitate from solution Background: The study of mass relationships in chemical reactions is called stoichiometry. All problems in stoichiometry involve mole-mole conversions. Such calculations are needed to determine both the quantities of reactants that are required for a chemical reaction, and the theoretical yield of the reaction. The reaction you will carry out in lab is a double replacement reaction between sodium carbonate and calcium chloride, in which a precipitate will form. You will isolate the precipitate by a process called vacuum filtration. In reactions, one reactant is often used in excess in comparison to the other. The excess reactant will not react c ...

  • 1 Pages

    abstract

    Uni. Westminster, JS 0516

    Excerpt: ... Jazzy Sharifan Write up #7 Caffeine Extraction Abstract In this study, the caffeine content of black tea was investigated and experimental data is displayed. The caffeine was extracted from a sodium carbonate and tea extract using dichloromethane. After the initial extraction, the dichloromethane layer was then centrifuged for fur ther separation of the compounds. After fil tration, the dichloromethane was evaporated by aspiration. The remaining caffeine was then sublimed. After sublimation, 0.01 g of caffeine was recovered. A percent yield of 0.98% was determined, which may have been inf luenced by chemical decomposition. ...

  • 2 Pages

    exp4w08

    UCSB, CHEM 6a

    Excerpt: ... pecies and nonorganic materials remain in the aqueous layer and takes advantage of the swelling caused by water in the tea leaves. Simply extracting the tea leaves with dichloromethane directly would prove fairly ineffective. The sodium carbonate (Na2CO3) added to the water during the "steeping" stage is to insure that the caffeine (a base) is not protonated by any of the organic acids in the tea. Thus, with the organic acids sequestered in the aqueous layer as their corresponding carboxylate salts, the caffeine will be free to dissolve in dichloromethane while the carboxylate salts will not (see Experiment 3). The caffeine supplied by extraction is fairly pure. However, sublimation will further purify the material separating it from tannins, pigments, and other natural products of tea. Procedure: This operation manually emulates a soxhlet extraction. Using a 50-125mL Erlenmeyer weigh 2.2 g of anhydrous sodium carbonate (Na2CO3), and then add 10 mL of deionized water. Heat this mixture on the hot plate/stirre ...

  • 6 Pages

    000484

    Rose-Hulman, CM 000000

    Excerpt: ... SODIUM CARBONATE ANHYDROUS SODIUM CARBONATE ANHYDROUS MSDS Number: S3242 - Effective Date: 05/17/01 1. Product Identification Synonyms: Carbonic acid, disodium salt; di sodium carbonate ; soda ash CAS No.: 497-19-8 Molecular Weight: 105.99 Chemical Formula: Na2CO3 Product Codes: J.T. Baker: 3602, 3604, 3605, 4502, 4923, 5198, 5834 Mallinckrodt: 1338, 7468, 7521, 7527, 7528, 7698 2. Composition/Information on Ingredients Ingredient - Sodium Carbonate CAS No -497-19-8 Percent -99 - 100% Hazardous -Yes 3. Hazards Identification Emergency Overview -DANGER! MAY CAUSE EYE BURNS. HARMFUL IF SWALLOWED OR INHALED. CAUSES IRRITATION TO SKIN AND RESPIRATORY TRACT. J.T. Baker SAF-T-DATA(tm) Ratings (Provided here for your convenience) -Health Rating: 1 - Slight Flammability Rating: 0 - None http:/www.mallchem.com/msds/s3242.htm (1 o ...

  • 5 Pages

    STANDARDIZING_YOUR_HCl_v2003

    St. Michael, CHEM 107

    Excerpt: ... Standardizing HCl, v 2003 Page 1 STANDARDIZINGYOURHClByTITRATIONWITHNa2CO3 We will react the HCl in your 0.225 M solution with a base which is quite well-behaved. The base is sodium carbonate , and it is a solid that is easily weighed. If you weigh 0.2500 g of sodium carbonate , sodium carbonate is what you have, and nothing else. The sodium carbonate you will use is an ACS primary standard, certified to be >99.95% pure. Na2CO3 + 2HCl 2NaCl + 2H2CO3 2H2O + 2CO2 1 mole Na2CO3 will react with 2 mole of HCl. This is an ACID-BASE reaction. Sodium carbonate is a base. FIRSTCalculatehowmuchSODIUMCARBONATEyouneed: a. BEFOREYOUCOMETOLAB,calculatehowmanymolesofHCltherearein25.0mLof0.2250M HCl(aconvenientvolumetouseinaburet) BEFOREYOUCOMETOLABCalculatehowmanymolesofSODIUMCARBONATEyouwill needtoreactwiththemolesofHClyoucalculatedinpartaabove. b. BEFOREYOUCOMETOLABC ...

  • 2 Pages

    CPR #2

    Texas A&M University, Corpus Christi, BIO 1407

    Excerpt: ... ything you need to know is at the bottom of page 2 of the yellow handout. Basic HTML coding is covered, as well as items such as headings and making active links to other URL's. There are also sections on how to create your documents in other programs (MS Word or Netscape Composer) and then copy them into CPR while preserving the formatting.(http:/www.mcli.dist.maricopa.edu/tut/lessons.html) HTML Tutor Guiding Questions: Here are the guiding questions provided by the publishers to guide you in your review. As a review, you can write in the first person. Remember; always refer back to the simulation. They want to know how good the simulation was in helping you to understand limiting reactant problems, not whether you know these facts by reading the textbook. Provide the OWL publishers with a good introductory sentence explaining your role as a reviewer of the Limiting Reactant simulation. Consider the reaction between calcium nitrate and 40.0 g sodium carbonate : 1. State the Law of Conservation o ...

  • 5 Pages

    ChemicalRxns

    Cornell, CHEM 2080

    Excerpt: ... eaction creates a white and opaque liquid without an obvious precipitate. Double displacement reactions are easy to balance because they simply exchange partners. A2. Sodium Carbonate and Hydrochloride Na2CO3 + 2HCl = H2O + CO2 + 2NaCl This balanced equation is able to demonstrate another doubledisplacement reaction in which CO2 fizzes strongly out of the given compound to create a light noise, bubbles and will continue to do so for the entire addition of the large amount of HCl. A3. Acetic Acid and Sodium Hydroxide HC2H3O2 + NaOH = NaC2H3O2 + H2O This reaction has an undetermined molarity in the compound sodium hydroxide. Determining the molarity is based on the number of drops it took to neutralized the H+ ions from the acetic acid. It took approximately 10 drops during the first minitration to balance 10 drops of .150 M acetic acid. As sodium hydroxide and acetic acid have the same number of moles in this equation they would have approximately similar molarities. Therefore, according to minitration 1, so ...

  • 11 Pages

    11-28 review for test 4

    N.C. State, CH 101

    Excerpt: ... trated. Review Lori Petrovich Acid-Base Reactions 1) A solution of hydrochloric acid is mixed with a solution of sodium phosphate 2) Sodium Carbonate is added to water 3) A solution of Hydrosulfuric Acid is mixed with a solution of Ammonia 4) A solution of sodium nitrite is mixed with a solution of ammonium bromide ...

  • 1 Pages

    Lab Notes - Exp 31

    Ocean County College, CHEM 182

    Excerpt: ... CHEM 182 General Chemistry II Lab Notes Exp. 31 Thermodynamics of Borax Dissolution Part A (1st lab period) Three Trials Start procedure at Step 3. Step 3 - Weigh sodium carbonate . Trial 1 Use about 0.15g Trial 2 Use about 0.20g Trial 3 Use about 0.25g Step 5 Heat flask on hot plate. Part B (2nd lab period) Step 1 Use 5.00 ml volumetric pipet. Dry test tubes. Step 3 Use 6 more test tubes (not the ones calibrated in step 1). Need 6 different temperature water baths (several groups can use the same water bath). Mark your test tubes with your initials. Use hot plates to heat water baths. Temperatures of water baths MUST be at least 6 C apart. The highest temperature CANNOT be higher than 60 C. Monitor temperature of water baths. Add ice as necessary to maintain temperature. Step 4 Agitate test tubes in water baths for 5 minutes. Keep test tubes in water baths for 10 more minutes allowing solid to settle. Step 5 QUICKLY, with a disposable Beral pipet transfer the clear liquid from the test t ...

  • 1 Pages

    Lecture.Activity

    University of Illinois, Urbana Champaign, CHEM 108

    Excerpt: ... Chemistry 108, Spring 2008 Lecture Activity: In each box of the table, write the expected observation for the tests you would carry out for the particular substance (a +, a -, or a color for the pH test). For any box in which a test is not necessary, write NA (not applicable) in the box. For example, there is no need to run a pH test on the substances that are not watersoluble. Test Water Solubility 10% HCl Vinegar pH Test Iodine Test NaOH Copper(II) Reduction Conductivity Test 1 2 3 4 5 6 7 8 9 10 11 12 1 = NaCl 2= NaHCO3 3 = C12H22O11 4 = C6H12O6 5 = CaSO4 6 = (C6H12O6)n 7 = MgSO47H2O 8 = Na2B4O7 9 = KHC4H4O6 10 = CaCO3 11 = NaOH 12 = Na2CO3 sodium chloride sodium bicarbonate sucrose glucose calcium sulfate cornstarch magnesium sulfate (hydrated) sodium borate potassium bitartrate calcium carbonate sodium hydroxide sodium carbonate ...

  • 2 Pages

    HW5_naming_ionic

    El Paso CC, SPOT 221

    Excerpt: ... Name: _ Date:_ Lecture Period:_ Homework Assignment 5 1.) List the element names for the following symbols: Cr, V, Ti, Rb, Sn, Pb, K, P, Na, Ag, and Cs 2.) List the possible ions formed from the followig symbols: Cr, Rb, Pb, Ag, and Sn. 3.) What is the formula of an ionic solid made up of potassium ions and sulfide ions? 4.) Write formulas for (a) sodium carbonate (b) magnesium chloride and (c) iron (III) bromide. 5.) Name the following ionic compounds. a. SrO b. Al2S3 c. ZnO d. Cr2O3 6.) Complete the following table: IONS nitrate sulfate sodium NaNO3 Na2SO4 silver ammonium mercury(I) zinc calcium magnesium copper(I) lead(II) aluminum manganese(III) cobalt(III) copper (II) iron (III) lead (II) potassium barium carbonate phosphate hydroxide chromate ...

  • 2 Pages

    c210fps04k

    MN State, GC 2

    Excerpt: ... Chem 210 Summer 2007 Problem Set #4 1. You have been studying the reaction of hydrochloric acid with sodium carbonate to form sodium chloride, carbon dioxide and water. a. Write a balanced chemical equation for this process. 2 HCl(aq) + Na2CO3(aq) -> 2 NaCl(aq) + CO2(g) + H2O(l) b. By monitoring the concentration of hydrochloric acid as a function of time, you have generated the following plots: Time (seconds) ln[HCl] [HCl] Time (seconds) 1/[HCl] Time (seconds) You have also observed the following set of conditions: [Hydrochloric acid]o [ Sodium carbonate ]o 1.524 0.818 1.524 1.636 What is the rate law expression for this reaction? Rate (M/sec) 2.16x10-3 0.00864 From the integrated rate law plots, the reaction must be zero order with respect to HCl(aq). Comparing the two runs, the concentration of sodium carbonate doubles while the rate of the reaction increases by a factor of 4 (that's 22), so the reaction is 2nd order w.r.t. sodium carbonate . Rateo = k [Na2CO3]o2 c. What is the value of the ra ...