Single Replacement: Stand a clean and dry test tube on the test tube rack and add about 5mL of HCl. Carefully drop a piece of zinc metal and observe briefly. Quickly cover the test tube with a cork and after a minute‚ insert a lighted match on the mouth of the test tube. A “Pop” indicates the presence of hydrogen. Pour 5mL of CuSO4 in a clean test tube and add a piece of zinc metal. Let it stand in the rack for five minutes. Pour 5mL of CuSO4 in another test tube. Using a pipette‚ transfer the solution
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Essential Trace ElementsAnthony L. JacksonBIO/350October 20‚ 2014Michelle GrayEssential Trace ElementsEveryone has their own beliefs on how the Earth was formed‚ and people can argue about it for hours or even days‚ but there is one thing that everyone can agree on is that all organisms are composed of matter. Matter is anything thing that takes up space. All organisms need some element to make them produce and to live healthy lives. There are two types of elements the essential and trace element
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required Ratio constraint for table to chair (Non-negativity constraint) 3. A fertilizer company makes a fertilizer using two chemicals that provide Zinc‚ phosphate and potassium. A pound of ingredient1 contributes 10 ounces of Zinc and 6 ounces of phosphate and one ounce of potassium while a pound of ingredient2 contributes two ounces of Zinc and 6 ounces of phosphate and 2 ounces of potassium. Ingredient1 costs $16 per pound and
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used‚ Distance between zinc strip and copper strip Materials: -Copper strip -Zinc strip -Basic meter (voltage‚ current) -3 Alligator clips -1.5 V Battery -Water container -Water samples -Cellophane tape Method and Procedure: 1. Connected the copper strip to a battery using an alligator clip. 2. Connected the battery to a basic meter using another alligator clip. 3. Connected the zinc strip to the other end of the basic meter. 4. Placed the copper and zinc strip on opposite sides
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The collision between the molecules in a chemical reaction provides the kinetic energy needed to break the necessary bonds so that new bonds can be formed. Thus‚ increasing the concentration of the anode‚ zinc sulfate‚ will increases the rate of reaction for oxidation because there are more zinc ions in the new concentration‚ which would also increase the collision between molecules. This will eventually allow an increase in the transferring rate of electrons to the cathode‚ as there are certainly
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Coupled Amplifier DC Voltmeter in a Digital Multimeter Copper Coins and Zinc-Galvanized Nails Procedure: 1. Set the multimeter to the “2V” (direct current) range. Turn it on. 2. To measure its voltage‚ insert the black and red probe to the potato. To increase the voltage‚ inject a coin and a zinc-galvanized nail to the said fruit‚ and connect it to the multimeter using the alligator clips‚ have the black probe to the zinc-galvanized nail while the red probe to the copper coin. 3. Read the value
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Barrier Protection ; In the method ‚ a barrier film is introduced between iron surface and atmospheric air. The film is obtained by painting‚varnishing etc. 2) Galvanization ; The metallic iron is covered by a layer of more reactive metal such as zinc. The active metal losses electrons in preference of iron. Thus‚ protecting from rusting and corrosion. Galvanized Metals Aim of the project; In this project the aim is to investigate effect of the metals coupling on the rusting of iron. Metal coupling
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Observe what happens when magnesium metal is placed in 1.0 M HCl solution. 2. Observe what happens when zinc metal is placed in 1.0 M copper nitrate solution. 3. Observe what happens when copper metal is placed in zinc nitrate solution. 4. Observe whether 0.1 M iron (III) chloride solution or iron (II) sulfate decolorize when added to 0.1 M potassium permanganate. 5. Add drops of potassium permanganate
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reactivity as measured by whether a chemical reaction has taken place? ” Prediction: *Using metal magnesium as an example illustration I. (Magnesium reacts with lead (II) nitrate) Mg + Pb(NO3)2 Pb + Mg(NO3)2 II. (Magnesium reacts with zinc nitrate) Mg + Zn(NO3)2 Zn + Mg(NO3)2 III. (Magnesium reacts with iron (III) nitrate) 3Mg + 2Fe(NO3)3 2Fe + 3Mg(NO3)2 Variables: The dependent variable for this investigation is the reactivity of each metal as measured by the occurring
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record is often associated with a pattern or profile to describe the protein domain or functional site. Please look at the record of PDOC00300 (http://prosite.expasy.org/PDOC00300) which is a GATA-type zinc finger domain that binds to DNA sites with the consensus sequence (A/T)GATA(A/G). This type of “zinc finger” domains consist of a consensus sequence of C-x2-C-x17-C-x2-C ‚ which means one Cys‚ two any amino acids‚ one Cys‚ 17 any amino acids‚ one Cys‚ two any amino acids‚ and one Cys. Please use this
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