Preview

Alum Synthesis Lab Report

Satisfactory Essays
Open Document
Open Document
340 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Alum Synthesis Lab Report
The experiment's objectives were to synthesize alum, test for various ions in alum, and form crystals in aqueous alum solution. The alum was synthesized from aluminum foil and run through a filtration system to isolate the alum.
2 Al(s) + 2 KOH + 22 H2O + 4 H2SO4 → 2 KAl(SO4)2●12H2O(s) + 3 H2(g)
Its composition was analyzed using two precipitation tests and two flame tests. Three methods for growing crystals were then set up for observation next lab.
Theoretical yield and percent yield: The theoretical yield for alum was 4.55g and the percent yield was 139%. The percent yield was above 100% because the alum was saturated with ethanol and water.
KOH test: The KOH test identified the presence of aluminum in alum. When KOH was added to an aqueous
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Better Essays

    Unknown White Compound 643p Lab Report
    • 1844 Words
    • 8 Pages

    Unknown White Compound 643p Lab Report

    The respective volumes of each solution were measured out in graduated cylinders and combined in a large beaker (to increase surface area for evaporation). With added heat to speed up the process, the water dissolved off leaving only the white powdery solid KCl. 0.937 g of substance was the final mass which since the theoretical yield was 1 g gave a 93.7% yield. Some KCl was likely evaporated with the water and some was likely lost in transferring from the beaker to the watch glass, so a 93.7% yield is adequate.…

    • 1844 Words
    • 8 Pages
    Better Essays
    Read More
  • Satisfactory Essays

    Nt1310 Unit 6 Lab Report
    • 782 Words
    • 4 Pages

    Nt1310 Unit 6 Lab Report

    CoCO3 (s) + 2 HBr  Co+2 (aq) + CO2 (g) + H2O (l) + 2 Br- (aq)…

    • 782 Words
    • 4 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Mole Formula Lab
    • 723 Words
    • 3 Pages

    Mole Formula Lab

    The objective of this lab was to conduct an experiment to analyze the molar components in alum. This was conducted by heating the alum till the water had evaporated and then determining the number of moles for each component. Then using the these amounts to figure out the empirical formula for alum.…

    • 723 Words
    • 3 Pages
    Good Essays
    Read More
  • Powerful Essays

    CHEM 120L Exam Notes
    • 3033 Words
    • 13 Pages

    CHEM 120L Exam Notes

    Ex. CuO (s) (black solid) + H2SO4 (aq) + H2O --> Cu(SO)4 (aq) (blue solution) + H2O…

    • 3033 Words
    • 13 Pages
    Powerful Essays
    Read More
  • Good Essays

    Chem Lab Project 2
    • 2646 Words
    • 6 Pages

    Chem Lab Project 2

    first test performed was the Metal Hydroxide Test, wherein drops of 6 M NaOH were added dropwise…

    • 2646 Words
    • 6 Pages
    Good Essays
    Read More
  • Better Essays

    Chem 112 Technical Abstract
    • 2544 Words
    • 11 Pages

    Chem 112 Technical Abstract

    To begin, 5 centrifuge tubes were added 10 drops of one cation and labeled correspondingly, and the initial color of each solution was recorded. To being the metal hydroxide test, each tube was then added 6 M NaOH drop wise (about 20 drops) until a precipitate was seen. To each solution that formed a precipitate, 10 more drops of 6 M NaOH were added. This was to test to see if any solution was amphoteric, where any insoluble metal precipitate dissolved after the additional 6 M NaOH was added. The results were recorded and each solution was disposed of. To being the ammonia test, 5 new centrifuge tubes were each added 10 drops of one cation and labeled correspondingly. 15 M NH4OH was then added drop wise (about 20 drops) to each solution and the color of the solution and/or the color of the precipitate formed was recorded. 10 more drops of 15 M NH4OH was added to each solution and any changes were recorded, and the solutions were disposed of. To begin the flame confirmation tests, 20 drops of each cation were added to its labeled centrifuge tube. A Bunsen burner was then connected to the gas jet and lit to where a sharp blue cone was visible in the flame. A Nichrome loop was then soaked in HCl and placed in the flame until there was no color change in the flame. This insured there was no further solution on the loop.…

    • 2544 Words
    • 11 Pages
    Better Essays
    Read More
  • Satisfactory Essays

    Analysis of Alum 1
    • 277 Words
    • 2 Pages

    Analysis of Alum 1

    Abstract: The purpose of this experiment is to find out the structure of the compound of alum through two tests. By determining the melting point of alum, and by determining the water of hydration in alum crystals by comparing the molar ratio between moles of AlK(SO4)2 and moles of H2O, the structure of the compound could be found. When a compound is created, it is essential to confirm whether or not the right compound has formed. There are many ways of determining to verify the identity of a compound. In this lab, two tests are used to determine whether or not the clear crystal is indeed, aluminum potassium sulfate (alum). The results are shown to support the literature value of the melting point of alum. The average experimental value of the melting point of aluminum potassium sulfate (alum) is 91.2 oC, approximately 1.8% error. In procedure #2, the ratio between alum and water is determined by dehydrating the water molecules from the AlK(SO4)2.12H2O. The experimental value of the ratio between alum and water is approx 10.4:12, so 10:12, approximately 13.3%…

    • 277 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Experiment 1: The Synthesis of Alum
    • 439 Words
    • 2 Pages

    Experiment 1: The Synthesis of Alum

    This experiment is used to perform a series of synthesis reactions that convert aluminum foil to alum. Alum is used in cooking, to treat wastewater, and is used in common deodorant. In this lab a series of four reactions will occur to yield alum.…

    • 439 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Aluminum: The 13th Element on the Periodic Table
    • 416 Words
    • 2 Pages

    Aluminum: The 13th Element on the Periodic Table

    One of the many elements on the periodic table is Aluminum. Aluminum is the 13th element, and it is located in period two and group thirteen. Aluminums symbol is Al and it has an electron configuration of [Ne] 3s2 3p1. Aluminum also has an atomic mass of 26.982 and its atomic number is 13. This element was discovered by Hans Christian Oersted in the year of 1825, and was named by the English chemist Sir Humphry Davy (Helmenstine, 2012). Its name ‘Aluminum’ came from the Latin words ‘alumen’ or ‘alum’, which is an astringent and dyeing mordant. Originally, Davy called it “Alumium’ but the publishers later changed it to Aluminum, and that’s how it remains in the United States (N/A, n.d.).…

    • 416 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    The Analysis of Alum
    • 1612 Words
    • 7 Pages

    The Analysis of Alum

    After a compound has been synthesized, tests should be carried out to verify that the compound fonned is indeed the compound desired. There are a number of tests that can be perfonned to verify that the compound is the one desired. In Experiment 15A, you prepared alum crystals, KAl(S04)z·12H 20. In Experiment 15B, you will conduct a series of tests to detennine if your crystals are really alum. The first test is to find the melting temperature of the compound and compare this value with the accepted (published) value for alum (92.5°C). The second test detennines the water of hydration present in the alum crystals. The third test is a chemical test to detennine the percent sulfate in your sample of alum.…

    • 1612 Words
    • 7 Pages
    Good Essays
    Read More
  • Good Essays

    Local Water Supply Analysis
    • 998 Words
    • 4 Pages

    Local Water Supply Analysis

    AAS is used by adding Na2S to test quantitatively for heavy metals and metal ions.…

    • 998 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    chemistry lab
    • 3757 Words
    • 34 Pages

    chemistry lab

    3) 2 H2 + O2 → 2 H2O 1) H2 + O2 → H2O 2) Ca + Cl2 → CaCl 4) Ca + C12 → Ca2Cl 14. Given the unbalanced equation: __Al2(SO4)3 + __Ca(OH)2 → __Al(OH)3 + __CaSO4 Balance the equation using smallest whole number coefficients. Quarter 1 Midterm Review 15.…

    • 3757 Words
    • 34 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Alum Synthesis
    • 1144 Words
    • 5 Pages

    Alum Synthesis

    The mass of a 250 mL beaker is measured, and .9 to 1.2 grams of aluminum can pieces are added to the beaker. The mass of the beaker and aluminum pieces is recorded. These two masses are then used to determine the initial mass of aluminum being reacted in this experiment. 50 mL of 1.4 M KOH is then added to the beaker and placed upon a hot plate under a fume hood to fumigate any escaping gases during the reaction, which should take no longer than 30 minutes. The heat from the hot plate speeds the reaction, and the reaction mixture must be kept no lower than 25 mL by adding distilled water. An aspirator is assembled by using a suction flask, clamp, ring stand, rubber tubing, funnel, and filter paper to filter the reaction mixture once the first reaction is complete. The filter paper is then wetted, the vacuum source is turned on, and the mixture is poured through the filter, using 5 mL of distilled water to rinse the beaker. The filter will catch all the dark filtrate from the aluminum can pieces, and the suction flask will contain a clear (transparent) solution. The solution is then transferred to a clean 250 mL beaker, and the suction flask is rinsed with 10 mL distilled water to insure all the remaining solution is transferred to the clean beaker. The beaker is placed in an ice bath to cool the solution, filling the beaker three fourths full with ice and cold water. 20 mL of 6.0 M sulfuric acid is measured and slowly added to the mixture, using a stirring rod to mix. Heat the mixture on a hot…

    • 1144 Words
    • 5 Pages
    Good Essays
    Read More
  • Good Essays

    Lab report
    • 708 Words
    • 3 Pages

    Lab report

    The overall goal of experiment four was to determine the identity of unknown cations presented to the student. But in order to know the identity of these unknowns, in part 1, Ag+, Pb+, and Hg22+ were presented to the student in aqueous solutions and then precipitated through experimentation. In part 2, the same procedure was enacted to determine which substances precipitated through qualitative analysis. Solubility rules were also a major theme as solubility is important in determining whether a reaction will produce a precipitate.…

    • 708 Words
    • 3 Pages
    Good Essays
    Read More
  • Powerful Essays

    Chemistry Lab: Stoichiometric Analysis of an Iron-Copper Single Replacement Reaction
    • 1905 Words
    • 9 Pages

    Chemistry Lab: Stoichiometric Analysis of an Iron-Copper Single Replacement Reaction

    Prior to the experiment, a 600 mL capacity glass beaker was obtained from the front of the laboratory. The beaker was weighed on a digital scale and its mass was determined to be 213.7 grams. A galvanized iron nail and a lump of steel wool was then collected from the front of the laboratory and the zinc coating on the iron nail was rubbed off using the steel wool. The iron nail was then weighed on a digital scale and its mass was determined to be of 6.5 grams. Two tablespoons of copper(II) chloride (CuCl2) crystals were then added to the beaker. The copper(II) chloride crystals were blue in colour, shown in Figure 1 below.…

    • 1905 Words
    • 9 Pages
    Powerful Essays
    Read More