Experiment 4 Composition of a Post-1983 Penny Lab Report Background: Through the use of percent composition one can easily find out how much of a certain element is in a compound or an item such as a post-1983 penny. The experiment will be using HCl a strong acid to dissolve all the zinc inside the outer copper shell. The reaction follows as such; Zn+2HCLZnCl2+H2‚ but there will be no reaction with copper. The portion that will be measured is the mass of copper left after all of the Zn goes through
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OBJECTIVE: To determine and compare the amount of calcium carbonate content of brown and white eggshells. MATERIALS: white and brown eggshells‚ water‚ deionized water‚ beaker‚ pipet‚ flask‚ test tube brush‚ funnel‚ hotplate‚ mortar‚ pestle‚ ethanol‚ HCl‚ phenolphthalein indicator‚ sodium hydroxide PROCEDURE: (Complete for both white and brown eggshells) 1. Get one egg and beaker and bring it to your lab station. 2. Break the egg into a beaker. 3. Add water to the egg and stir before you pour
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100 mL of 1.00mol/L HCl(aq) to the calorimeter. 2. Record the initial temperature of the HCl(aq) to the nearest tenth of a degree. 3. Find the mass of no more than 0.80 grams of MgO(s) powder. Record exact mass. 4. Add the MgO(s) powder to the calorimeter containing the HCl(aq) swirl the solution gently‚ recording the highest temperature reached. 5. Dispose as directed by teacher. Part 2: Determining ΔH of reaction (3) 1. Using a graduated cylinder‚ add 100mL of 1.00mol/L HCl to the calorimeter
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Purity of Aspirin Objectives - To research‚ using various sources‚ the history of aspirin‚ its use in medicine‚ methods of synthesizing it and of measuring its purity - To compare the % purity of a branded aspirin tablet with a generic aspirin tablet - To compare 2 methods of composition analysis of the two types of aspirin Research
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Abstract By adding HCl to 2-methyl-2-butanol‚ through the Sn1 mechanism‚ 2-chloro-2-methylbutane is formed. Water‚ sodium bicarbonate and NaCl(aq) were then added to the 2-chloro-2-methylbutane to remove any of the excess water from the reaction. To confirm‚ a successful reaction‚ AgNO3 was added to the 2-chloro-2-methylbutane. A white precipitate formation confirmed a successful Sn1 reaction. Introduction Nucleophilic substitution reactions such as Sn1 and Sn2 allow us to convert one functional
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1.0 Title Determination of Protein Content Using Kjedahl and Titration 2.0 Introduction Proteins are polymers. They are the source of dietary amino acids and are used for growth and maintenance of living systems. They are costlier sources of energy compared to carbohydrates and fats and hence the human body utilizes proteins mainly for biosynthesis rather than as an energy source‚ though the energy yield is 5 kcal/g of protein. Twenty different types of amino acids occur naturally in proteins
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Detection of Ions in Solutions Using Acid/Base Chemistry: A Quality Control Test Objective: This lab focuses on the detection of ions using titration as an analysis tool. You will standardize NaOH and HCl solutions so that you know the exact concentration and then prepare samples of common household items in order to determine the amount of calcium in Tang®‚ Mg(OH)2 in Milk of Magnesia‚ etc. You will learn to prepare samples of a specified concentration‚ learn about acids and bases through
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Science Coursework-Rates of Reactions Introduction Investigating how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment. In addition I am also checking how different variables affect my experiment and also how I can make my test more precise‚ reliable and accurate. Strategy According to my results‚ as the concentration of STS solution increased the rate of reaction of my experiment was increased. Also as the concentration
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part B the relative rate of diffusion of two different gases at the same temperature is given by the relationship: r1 /r2 = (M2 / M1)1/2 Once the two different gases meet‚ in this case they are HCl and NH3 ammonium chloride will appear‚ HCl(g) + NH3(g) ------> NH4CL(s) ! ! ! ! ! ! ! EQ. I1 EXPERIMENTAL METHODS Please refer to the Poe‚ Judith CHM110F course manual‚ experiment 2: Behavior of Gases on page 42 - 46. No deviations were made.
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I. Introduction The purpose of this experiment is to determine the pH values of acids‚ bases‚ and buffers of distilled water and 10.0 buffer using measured concentrations of Sodium hydroxide (NaOH) and/or Hydrochloric acid (HCl). Acid is a compound typically having a bitter taste and capable of nullifying alkalis and releases hydrogen ion when added to a solution‚ or containing an atom that can accept a pair of electrons from a base (McKinley‚ Dean O’Loughlin‚ & Stouter Bidle‚ 2016). Bases are water-soluble
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