There is room for further discussion here apart from the Bernouilli effect per se , regarding the changing color of the flame. Less air goes in, if the combustion products of the match take its place. I published a riddle relating to the Bunsen burner flame in Chem13 News , February , page 4. Skip to main Skip to footer. February The following are a few other demonstrations in the same vein.
Demonstration 2 Observe a wire gauze lowered onto a cool flame. Students eventually suggest that the centre of the flame contains unburned gas, and students may eventually suggest a test such as this: Demonstration 3 Another interesting little experiment is to heat a thick piece of copper so that it blackens on removing it from the flame CuO is formed ; on putting it back in the flame, the shiny pinkish colour reappears on the surface as long as it is in the flame, but on withdrawing it, it turns black again.
Demonstration 5 The students are always inquisitive to know what part the holes play in determining the flame color and heat. More about February Read More. Chem13 news magazine. Grab your lab coat. Let's get started Welcome! It seems this is your first time logging in online. Please enter the following information to continue.
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Benefits Enjoy these benefits no matter which membership you pick. Thank you! You might also like Chemistry in Pictures: Green flow. Reaction Dynamics. Oxygen and magnesium combine in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide.
Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction. An exothermic reaction is a term that describes a chemical reaction in which there is a net release of energy heat. Magnesium is also capable of reducing water to the highly-flammable hydrogen gas, which will be ignited by the excess heat given by the reduction reaction.
Hence, carbon dioxide fire extinguishers cannot be used for extinguishing magnesium fires either. Burning magnesium is usually quenched by using a Class D dry chemical fire extinguisher, or by covering the fire with sand to remove its air source.
Wear goggles that filter out UV light. Throw the powder in the garbage. Reaction When magnesium is in its metal form it will burn very easily in air. Materials strip of magnesium metal ribbon - 4 inches long lighter.
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