glass Stirring rod Evaporating dish Magnet Magnifying glass Crucible tongs Spatula Balance Meeker burner Ring stand Iron ring Wire gauze Forceps Sulfur Iron filings Sodium Bicarbonate Sodium Chloride Sugar Sand Magnesium ribbon Hydrochloric Acid Distilled water Filter paper 9 disposable dishes Procedure: 1. Label 7 of the dishes with the names of the following products: Sulfur‚ Iron‚ Sodium Bicarbonate‚ Sodium Chloride‚ Sugar‚ Sand‚ and Magnesium. Place small samples of each
Premium Chlorine Water Hydrochloric acid
OLD COINS TURN TO GOLD DESIGN: Problem or Research Question: How does zinc effects the color change in a copper penny? Hypothesis: If copper and zinc comes together‚ then it will form brass‚ which gives gold color to copper penny. Variables: There were no variables at this experiment PROCEDURES: Materials: Zinc (SN) filling‚ 3M NaOH solution‚ Copper penny‚ tongs‚ Hot plate‚ 100 ml beaker‚ 250 ml beaker‚ Bunsen burner‚ Water‚ Spoon. Procedure: First‚ we turned on the hot plate.
Premium Zinc Primary color Copper
Abstract: Titration is a technique that has been used in this experiment to identify the Ksp value of calcium hydroxide in order to determine the extent to which the compound is soluble in water. A known volume of 50 mL of hydrochloric acid‚ a concentration of 0.05 M hydrochloric acid‚ a volume of 50 mL calcium hydroxide base‚ an unknown concentration of base and an acid-base indicator (bromothymol blue) has been used in this experiment to determine the concentration of calcium hydroxide. From the
Premium PH Titration PH indicator
25mL pipette Controlled: Amount of hydrochloric acid 1M – 2 drops from a dropper bottle Controlled: Amount of distilled water – 4mL measure using a 25mL pipette Controlled: Molar concentration of hydrochloric acid (HCl) – 1M controlled using the same dropper bottle of HCl each time Hypothesis As the temperature of the juice increases the content of Vitamin C will decrease. Materials Nudie orange juice Iodine Starch solution Dropper bottle hydrochloric acid 1M Distilled water 3 conical
Premium Vitamin C Vitamin
then allowed to cool. Reaction between the alcohol with the oxidizing agent will produce sodium salt (i.e sodium benzoate)‚ which on acidification with hydrochloric acid will produce benzoic acid. Objective To prepare benzoic acid from benzyl alcohol. Materials Sodium hydroxide‚ potassium permanganate‚ benzyl alcohol‚ concentrated hydrochloric acid‚ sodium sulphite‚ methyl orange solution‚ anti-bumping stone granules‚ Buchner funnel‚ 100 mL round bottom flask‚ and filter paper. Methods 1. The
Premium Carboxylic acid Alcohol Potassium permanganate
leading to a collection of developmental and physiological conditions commonly grouped as “lead poisoning.” In brief‚ lead acts on small biological systems that affect a major system‚ an example of which are zinc-finger proteins. The zinc-finger‚ a common protein motif‚ relies on the coordination of Zinc (Zn) ions for the protein’s shape and stability; therefore‚ any alterations can affect its shape and‚ inherently‚ its function. In an article by Jacqueline Michelle Ordemann and Rachel Narehood Austin‚
Premium Lead Zinc Protein
2.496 grams 2. What is the percent copper and zinc in a post 1982 penny? - 97.5 % Zinc and 2.5 % Copper 3. How many grams of copper and zinc are in a post 1982 penny? - (2.496 x 0.975) = 2.43 g of Zinc (2.496 x 0.025) = 0.062 g of Copper 4. How many moles of copper and zinc are in post 1982 pennies? (2.43 g Zn x 1 mol Zn) / 63.38 g Zn = 0.037 mol Zn (0.062 g Cu x 1 mol Cu) / 63.54 g Cu = 0.00097 mol Cu 5. Write a balanced reaction of zinc with HCl. - Zn (s) + 2HCl (aq) ZnCl2 (aq) + H2
Premium Chemistry Chemical reaction Concentration
Introduction When we eat such things as bread‚ meat‚ and vegetables‚ they are not in a form that the body can use as nourishment. Our food and drink must be changed into smaller molecules of nutrients before they can be absorbed into the blood and carried to cells throughout the body. The things we eat turn into things such as carbohydrates‚ fats‚ and proteins. Carbohydrates are‚ any of a large group of organic compounds occurring in foods and living tissues and including sugars‚ starch‚ and cellulose
Premium Digestion Starch Protein
Determination of Trace Amount of Copper and Zinc in an Aqueous Solution by Atomic Absorbance Spectroscopy Abstract: The purpose of this experiment is to analyze a sample containing copper and zinc in trace amounts‚ where standard addition method was used and the instrument used is the atomic absorbance spectroscopy. The amount of copper obtained was 0.569 ppm ± 0.015 and for zinc we obtained 0.42 ppm ± 0.0027. Introduction: This method implies the excitation of particles in the solution sample
Premium Chemistry Chemical reaction Copper
fruits and vegetables) using two strips of metal. The most readily available combination is copper and zinc. The zinc piece can be taken from the casing of an old carbon "D" cell (battery); some zinc coated nails may work as well. The copper can be a coin containing a high amount of copper. (Note: some recent copper coins‚ including the newer U.S. pennies‚ contain low amounts of copper mixed with zinc. If in doubt‚ use a pure copper strip.) They are stuck into the lemon‚ and wires are attached to each
Premium Lemon Battery Citrus