2b.Comment on your y-intercept. The y- intercept gives the mass of the zinc when no volume is displaced. This represents the mass of zinc that is too small and insignificant. It is the point where density can not be determined. 3.Here is the multiple choice question.
A small round piece of zinc sinks when thrown in a pond and a substance like mineral oil floats on water (remember the test for iodine). But if that is true then why does a zinc-plated ship float on water? A zinc-plated ship floats on water because of its shape. If the body of the ship (hull) is designed perfectly then it can compensates for its own mass by displacing a sufficient amount of the mass of water. It has to displace enough mass of water before it sinks.
6. Zinc Sheet: a rectangular, thin, sheet like metal, gray/silver. 6 5 4 3 2 1 * Solubility of solid iodine; 1. Solid iodine in 1 mL of water is slightly soluble, because the solution turns into a light brown/yellow color. However majority of the solid Iodine was left at the bottom of the test tube; which leads to the conclusion that it’s not reactive on water.
Determination of Copper Metal Ions Through Reactions with Zinc Aim: The aim of this experiment is to determine which of the common copper ions, Cu+1 and Cu+2, is present in each of two unknown copper compounds, and whether or not the copper compounds contain the same copper ion. Nomenclature: Light blue substance: LB Dark blue substance: DB Preliminary Calculations: Identify the available test metal with the highest ionization energy. The available test metal with the highest ionization energy is Zinc. Because Zinc has the highest ionization energy (904) compared to Magnesium (736), and Aluminium (578), Zinc will be used in this experiment. Create reactions with anion placeholders for copper compound and Zinc.
Lab Report: The Redox Arena PART 1 Results TEST | Solute | Iodine test | Iodide ion test | Triiodide test | Zinc ion test | Zinc metal test | Grey solid(Zinc metal) | NegativeSolid settled in bottom | NegativeNo change | Negative | NegativeNo change | PositiveFizzing seen | Colored solution(Mixture of zinc and iodine in acidified water. Reaction is incomplete) | Positive Light purple layer formed on top | Positive Precipitate | Positive | Positive Black dust on top | Negative No change | White solid(Zinc iodide) | NegativeSolid stayed in bottom | Positive Precipitate | Negative | Positive Blotches of black | Positive Fizzing seen | Iodine crystals | PositivePurple layer formed | Negative | Negative | Negative Fizzing | NegativeTurned greenish yellow | Granular zinc metal | Negative No change | Negative | Negative | NegativeNo change | Positive Fizzing seen | Zinc ion and iodine-triiodide in water | Positive Purple layer formed | Positive Pale yellow precipitate | Positive | Positive Patch of black | Negative Turned reddish | Solid zinc iodide | Positive Pink layer formed | Positive Pale yellow precipitate | Positive | Positive Black deposit and fizzing seen | Negative Dissolved completely | Focus question 1. Zinc and Iodine, in the presence of acidified water, react chemically to form Zinc Iodide (ZnI2) solution. The atoms of Zinc and Iodine form an ionic bond, with Zinc becoming attracted to two Iodide ions. The water can be removed via heat and we are left with a white solid, Zinc Iodide sold.
Task 3 (D4) Choose one primary and one secondary cell and evaluate their use for portable applications. Primary – (silver oxide cells) Zinc-silver oxide cells effectively use the high electrode potential of silver to produce a high energy density that is combined with a flat discharge curve. This is done as silver oxide forms a positive anode for the cell which could also be mixed with little amounts of manganese dioxide. The metallic zinc in the battery powers the negative electrode which is formed into a gel like substance with the electrolyte usually sodium hydroxide or potassium hydroxide. A separator membrane will then be infiltrated between the negative electrode gel and positive electrode preventing them from being mixed together which would make the battery useless if not in place.
If so, write a balanced equation for it. 3) Grind the copper chloride crystals onto the aluminum foil to create more contact between them. What do you observe? 4) Add a few drops of water to the pile of crystals. What do you observe?
Zinc ion and Iodine-iodide-triodide ion in water: It was a liquid solution in a bottle, it was very dark orange-brown color. Solid Zinc Iodide: A very white powdery substance that had several clumps within it. It was also very dry in nature. Mass Table Substance Amount of Mass Measured for Actual Mass Granular Zinc 2.0 grams 1.9 grams Iodine Crystals 2.0 grams 2.1 grams Observation of Reaction Shown below and Included within the lab notes on pages 12 and on page 14. Placing Acetic Acid in Zinc and Iodine test tube After placing the Acetic Acid in a normally unreactive test tube containing Zinc and Iodine, the solution changed to a more orange and then to a more red-brown color.
Results APPEARANCES OF MATERIALS USED Substance Physical Appearance Zinc Carbonate White; powderish Calcium Hydroxide White; powderish; like zinc carbonate 3 M HCL Clear liquid, resembles water 20 mesh granular zinc Grey, metallic, shiny 3% hydrogen peroxide Clear liquid; resembles water Manganese dioxide Very dark grey, black and powdery Copper sulfate Blue, crystalline in structure. Sky blue Zinc iodide Very dark purple, shiny and crystalline in structure 0.1 M acetic acid Clear liquid, resembles water Zinc oxide Very white powdery substance RAW RESULTS Data Specifided (Page 112 CRC handbook) Raw data Volume of Gas Collection Bottle (Average of 3 Trials) 14.04mL Mass of boiling tube (empty) 41.57g Mass of boiling tube with zinc carbonate 43.42g Mass of zinc carbonate 1.75g Volume of water in gas collection bottle after reaction 78.5mL Volume of gas product collected 185.2mL Mass of solid product with boiling tube after reaction 1.11g QUALITATIVE TEST RESULTS Group # Test Observation: Standard Positive/Negative Observation: Experimental Positive/Negative 1 H2 HCL + Zinc bubbling + flaming stick POP! + + flaming splint no POP - 2 CO2 Turned cloudy + Negated from experiment Negated from experiment 3 O2 MgO2 + Hydrogen Peroxide bubbling. Glow stick re-ignited + + wooden splint; glowing stick went out - 4 H2) Added 1 pea size CuSulfate + 1 drop of deionized water; blue, positive + Copper sulfate did not change color when put into wet filter paper - 5 Zn (OH)2 Zinc iodide + 3mL H2O Clear suspension + Visual inspection; cloudy. Acid test= solid + 3M Acetic acid cloudy + 6 ZnO ZnO + Heat yellow Zn Cooled White + ZnCO3 + heat yellow solid.
Silver Nitrate can be used to remove warts by being used as a cauterizing agent in certain procedures. Dentists heal ulcers in the mouth with the help of this substance. To give a clear and detailed reflection, mirrors are coated with Silver Nitrate on one side. Silver Nitrate can also be used in photography, explosives, inks, and pottery. Reactant B- Sodium Chromate(aq)~Na2CrO4 Sodium Chromate is an odorless yellow crystalline powder.