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| 1. | 1.Why should a magnesium Tibbon be cleaned before burning in air? | 
| Answer» Magnesium ribbon should be cleaned before burning in air to remove the basic magnesium carbonate coating on it. This layer should be removed so that the ribbon may readily combine with oxygen while burning in air. Basic magnesium carbonate layer consists of magnesium carbonate and magnesium hydroxide. Magnesium ribbon should be cleaned before burning in air to remove the basic magnesium carbonate coating on it. This layer should be removed so that the ribbon may readily combine with oxygen while burning in air. Basic magnesium carbonate layer consists of magnesium carbonate and magnesium hydroxide. To remove basic MgCo3 coating Magnesium ribbonshould becleanedwith sandpaperbefore burningin the air. ... To remove theMagnesiumoxide layer from theribbonwhich may prevent or slow down theburningofmagnesium ribbon. Unwanted impurities deposited on themagnesium ribboncan be removed and only puremagnesiumcan be used for the reaction. | |