Copper metal 2 Zinc metal 2 Cables Multimeter 1 Light Blub 1 Procedure: 1. Gather all things needed for experiment. 2. With the help of the adult‚ remove plastic coatings at the end of all wires with scissors. 3. Gently roll each fruit on a table to soften it or squeeze it with your hands. The purpose of this is to make the juice flow inside the fruit without breaking the skin. 4. Take the white cable and tie one end to the Zinc metal contact and
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Observations During the first step of this lab‚ when obtaining the hydrogen from the mossy zinc and the hydrochloric acid‚ it took a lot longer than I thought it would for the water in the pipet to be displaced. I was tempted to remove the stopper and add another piece of zinc and see if that would make it go faster‚ but I did not want to interrupt the process. It seemed the longer that the mossy zinc was exposed to the hydrochloric acid the faster it dissolved and therefore more gas was produced
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Metals and Non-metals Elements are divided mainly into two groups on the basis of physical and chemical properties – Metal and Non-metal. Metals: Part - I Physical Properties of Metals:- Hardness:- Most of the metals are hard‚ except alkali metals‚ such as sodium‚ potassium‚ lithium‚ etc. Sodium‚ potassium‚ lithium etc. are very soft metals‚ these can be cut using knife. Strength:- Most of the metals are strong and have high tensile strength. Because of this big structures are made using metals
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electrochemical cell. An electrochemical cell converts chemical energy into electrical energy. In the potato battery‚ there is a transfer of electrons between the zinc coating the galvanized nail that will be inserted into the potato and the copper wire that will be inserted another part of the potato. The potato conducts electricity‚ yet keeps the zinc ions and copper ions separate‚ so that the electrons in the copper wire are forced to move (generate current). It’s not enough power to shock you‚ but the
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influences. Materials/Procedure: I gathered my materials from the material list and set up my data table. I combined the zinc and HCl‚ then captured the Hydrogen that was produced and observed the combustion reaction with a flame. I then captured more hydrogen to use later in the experiment. I combined manganese with hydrogen peroxide which bubbled much the same as the zinc and HCl to produce oxygen. I observed the reaction of the oxygen with a burning ember. I then captured more oxygen in the bulb
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Colorless | sodium sulfate | Colorless | sodium hydroxide | Colorless | sodium chloride | Colorless | sodium carbonate | Colorless | potassium nitrate | Colorless | magnesium nitrate | Colorless | iron (III) nitrate | Yellowish Hue | zinc nitrate | Colorless | copper (II) nitrate | Bluish Hue | calcium nitrate | Colorless | Pre-Lab Questions: A double replacement reaction is a chemical reaction that usually takes place between two aqueous ionic
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latex) at 0.2% ammonia) and 0.025% of 1:1 mixture of tetramethylthiuram disulphide (TMTD) and zinc oxide. The HA system poses serious environmental problem such as strong smell due to the presence of large amount of ammonia. On the other hand‚ TMTD has been implicated to produce carcinogenic nitrosamines in rubber products and is an allergen causing contact dermatitis (Type IV allergy). Furthermore‚ zinc is considered toxic especially in food-contact applications and is a source of heavy metal in
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Corrosion of Metals Introduction Have you ever had a bike that went rusty‚ figure 1? If the paint is scratched and the rust allowed to spread‚ it is very difficult to repair the frame so it looks as good as new again. Rusting costs us millions of pounds each year‚ either through replacing things or through trying to prevent it happening in the first place. Figure 1: Bike rusting. In this booklet you learn about rusting and ways of stopping it‚ followed by a look at another metal‚ aluminium that
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The Best 9 Roofing Materials – Pros‚ Cons & Costs There are a number of types of roofing materials you can choose for your home. While every roof should blend with the aesthetic look of the structure‚ the alternatives are a personal choice. Some roofs work better in densely wooded environments‚ while others repel sunlight and reflect heat. Choosing the right roof for your home requires weighing the pros and cons of each material and finally the cost. The Best 9 Roofing Materials Selecting the
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Experiment 1 1. Pour about 1cm of hydrochloric acid into each test tube 2. Drop a piece of zinc into each of the first two test tubes. Reduce the concentration of the hydrochloric acid in the second test tube by adding water until it is half-full. 3. Compare the speeds of the reactants in the two test tubes and record your observations in the table. Experiment 2 1. Drop a piece of zinc into each of the third and fourth test tubes. Add water to both test tubes until they are both half-full
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