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Over time, copper pennies turn brown as the copper oxidizes with air. Vinegar and other weak acids such as citrus juice dissolves this layer of copper oxide. After soaking the penny in the acid, rinse it with clean water and you'll be left with a shiny penny.
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Core practical making copper sulfate crystals. There are a number of ways that you could make copper sulfate crystals in Chemistry. This is an outline of the required steps to undertake one of ...
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The Reaction. When a copper wire is introduced into an aqueous silver nitrate solution, a single replacement reaction occurs. This is when two elements in a reaction swap places, one replacing the other. This is a type of redox reaction. At the beginning of the experiment, the pure elemental form of copper (Cu) is oxidised by the silver nitrate ...
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13 When copper sulphate is dissolved in water the solution becomes acidic Why? 14 Why does copper II sulfate turn blue when water is added? 15 What do you observe when you add 2 3 drops of water on the sample of copper sulphate obtained after heating? 16 Why does white copper sulphate turn blue on adding few drops of water? 17 What type of ...
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· Police were called when neighbors reported a woman having with her pit bull in her backyard in broad daylight. When they arrived, they found Kara Vandereyk "naked and on the ground ...
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Check free live currency rates, send fast money transfers to 130+ countries, and view currency data and analysis using the most accurate, uptotheminute data.
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Give the chemical symbol, including superscript indiion mass number for. a) the ion with 22 protons, 26 neutrons and 19 electrons. b) the ion of sulfur that has 16 neutrons and 18 electrons. a) 22 + 26 = 48 is the mass number; 48/22 Ti+3. b) 16 + 16 = 32 is the mass number; 34/16 S 2.
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cuso4 5h2o heated. A photoelectric experiment is performed by separately shining a laser of 450 nm blue light and 560 nm yellow light on a metal surface and measuring the number and kinetic energy of the ejected electrons.
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Jan 31, 2018 · (a) Why do silver articles turn black when kept in the open for a few days? Name the phenomenon involved. (b) Name the black substance formed and give its chemical formula. 39. On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed
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· This color does not extend, however, to the particles given off by entities who ultimately receive the effect. The numeric color codes are equal to the hex code of the color converted to a decimal number, or can alternatively be calculated from the Red, Green and Blue components using this formula: Red <<16 + Green <<8 + Blue.
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Copper sulfate pentahydrate appears as blue crystalline granules or powder. Melting point 110°C (with decomposition). Noncombustible. Nauseating metallic taste.
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Mar 18, 2016 · It can dissolve gold and platinum. Give reason: Aluminium is highly reactive metal, but it is used to make utensils for cooking. Explain why (a) Iron articles are frequently painted. (b) Iron sheets are coated with Zinc layer. On adding dilute HCl acid to copper oxide powder, the solution formed is blue – green.
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Apr 01, 2018 · Benedict's solution is used to test for nonreducing sugar. It is a copper sulphate solution. when in the presence of nonreducing sugar, the light blue solution turns into an orange red precipitate (copper (I) oxide). the copper sulphate is reduced to copper oxide. Fehling's test can also be used to test for nonreducing sugars. Upload failed.
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