Why should a magnesium ribbon be cleaned

Why should a magnesium ribbon be cleaned before burning it? Find the answer to this question and access a vast question bank customized for students.

Questions from inside the book. Last updated at May 29, by Teachoo. Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class. CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. Your browser does not support the audio element. Maths Classes.

Why should a magnesium ribbon be cleaned

Hint: Magnesium is a very reactive metal. When it is kept in the open air it can react with the gases present in the air. Cleaning will remove those impurities formed due to the reaction with air. Complete Answer:. Let us see why it is important to clean the surface of the magnesium ribbon before burning it. Metals which are in the second group of the periodic table are called the alkaline earth metals. They are very reactive since they have just two electrons in their outer electron shell. This coating hinders the burning of the ribbon as this layer does not burn easily. To do so we have to clean the surface of the ribbon. Cleaning the surface of the magnesium ribbon will remove the oxide layer from the surface and thus it will allow the ribbon to burn effectively to get the desired result.

This happens when it burns in the presence of oxygen and moisture. Always remember that magnesium only reacts with oxygen in the air to form an oxide coating on its surface but it does not react with the atmospheric nitrogen at all.

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In association with Nuffield Foundation. Students weigh magnesium and heat it in a crucible, noting the change in weight they can discover the formula for magnesium oxide. This experiment is included in our Conservation of mass video, along with supporting resources , including illustrated technician notes , integrated instructions , worksheets, a structure strip and more. The practical activity takes around 30—45 minutes, depending on the competence of the class. Students should all be standing and should wear eye protection. Students with long hair should tie it back. It is a good idea for students to practice lifting the lid on and off the crucible and the crucible off the pipe clay triangle before they start. This has the added bonus of checking that all the tongs are functioning correctly. To enable students to light their Bunsen burners they will need access to matches or lighters. The most significant hazard in this experiment is the hot apparatus.

Why should a magnesium ribbon be cleaned

A physical change occurs when there is no change in the composition of a substance and no change in the chemical nature of the substance. A chemical change is a change that causes a change in the chemical properties of matter, resulting in the formation of a new substance. As an example, consider the burning of oil or fuel. Heat is evolved or taken in, the formation of bubbles, gas, and fumes, as well as a change in the colour of the reactants, can take place when they form a product. To carry out the Burning of magnesium ribbon in air and classify it as physical and chemical changes. During this process, two elements, magnesium and oxygen, react to form the compound magnesium oxide. Such reactions are referred to as combination reactions. The burning of magnesium ribbon is a combination reaction. This is because magnesium reacts with oxygen to form a single product magnesium oxide.

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Old search 1. Hence a very famous question is asked regarding magnesium. Metals which are in the second group of the periodic table are called the alkaline earth metals. Magnesium ribbon should be cleaned before burning it because it quickly forms the white layer of magnesium oxide, which does not burn. Questions from inside the book. Please login :. A question might pop up if there is any catalyst present to speed up this reaction if anyone is unable to clean the magnesium ribbon. Q- Why should a magnesium ribbon be cleaned before burning it? Complete Answer:. Access free live classes and tests on the app. Solve all your doubts with Teachoo Black! Displaying ads are our only source of revenue. Hence to understand the answer to this question, we must understand that magnesium is a reactive element.

Hint: Magnesium is a very reactive metal. When it is kept in the open air it can react with the gases present in the air. Cleaning will remove those impurities formed due to the reaction with air.

Hence to stop the formation of this white layer, impurities which are not needed should be cleaned from the surface of the magnesium ribbon, and only the pure magnesium should be burned. Unfortunately, it is not possible to do this at this point in time, but as we progress with our research work, we are quite optimistic we will develop some techniques for this too. To do so we have to clean the surface of the ribbon. In Indian rupees, 1 trillion is equal to how many crores? Find the answer to this question and access a vast question bank customized for students. Magnesium ribbon should be cleaned before burning it because it quickly forms the white layer of magnesium oxide, which does not burn. Any reaction which involves the process of burning the magnesium ribbon should ensure that the ribbon must be cleaned properly, or else it will hinder the rate of reaction. This happens when it burns in the presence of oxygen and moisture. It's free :. Ans : Magnesium is a very active compound chemically. Maths Classes Teachoo Black.