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calcium carbide water

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seirra koveza

on 30 October 2012

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Transcript of calcium carbide water

calcium carbide and water what is calcium carbide ? Calcium Carbide Calcium carbide is a chemical compound with the chemical formula of CaC2. Calcium carbide reacts with water to generate acetylene gas. The acetylene gas is combustible, which makes it useful in generating light. This type of light source was common before battery-operated and electric lights became available. Many cavers still use this light source when they are deep underground. Its main use industrially is in the production of acetylene when it comes in contact with water. CONTACT WITH WATER CaC2 + 2H2O --------> C2H2 + Ca(OH)2
Calcium carbide reacts with water to make acetylene gas When any grade of calcium carbide comes into contact with water, a chemical reaction immediately begins, which is acetylene. An important reaction of acetylene is its combustion. Acetylene is relatively acidic, though it is still much less acidic than water. Countries such as China use large amounts of acetylene as an industrial fuel, mainly because it is cheaper to make and use domestically than to import petroleum for the same purpose. In the reaction between calcium carbide and water, acetylene gas is produced:

CaC2(s) + 2H2O(l)------> Ca(OH)2(s) + C2H2(g) T To conclude our presentation, the reaction of calcium carbide (which is CaC2) in water (H2O) produces acetylene gas, as demonstrated in the video. Calcium carbide is hard, conductive and combustible; and water is colourless and also conductive, but not combustible.

CaC2 + 2H2O --------> C2H2 + Ca(OH)2
Calcium carbide reacts with water to make acetylene gas

Thanks for watching! Qualitative Physical Properites:
-Colour: black-gray
-State: solid
-Lustre: dull
-Malleability: hard Physical and Chemical Properties of Calcium Carbide Quantitative Physical Properties:
-Melting Point: 447 °C
-Boiling Point: 2300 °C
-Density: 2.22 g/cm3
-Conductivity: conductive, the higher the purity, the electrical conductivity occurs more easily Chemical Properties:
-reacts to produce acetylene
-very combustible
-Stability: stable as long as sources of
moisture are excluded;
not stable with water Physical and Chemical Properties of Water Qualitative Physical Properites:
-Colour: colourless
-Sate: liquid
-Texture: smooth
-Odour: odourless Quantitative Physical Properties:
-boiling point: 100 °C
-Density: 1 g/cm3
-Conductivity: conductive, water that is more purified is less conductive Chemical properties:
-Water can be split by electrolysis into hydrogen and oxygen
-Combustibilty: NO.
-Toxicity: the more pure the water is, the less toxic. Some of these properties are phyiscal because they can be observed and measured without changing the identity of calcium carbide and water.
Other properties are chemical beacuse they describe how the substance reacts with another substance to form a compound. In this presentation about calcium carbide and water, we will explain the physical and chemical properties of water and calcium carbide, and what exactly calcium carbide is. The reaction and a video of calcium carbide and water to produce the compound will also be included.
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