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Recitation session one

Recitation session one - Recitation session one Question 1...

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Recitation session one. Question 1 In 1775 a French scientist, Lavoisier reported that he had formed a red solid substance that floated on mercury after exposing that liquid metal to moderate heat in air for a long time. When he collected the red substance off the surface and heated the pure red solid strongly, he noticed that he obtained metallic mercury again. Let’s examine this decomposition reaction more in detail. Lavoisier was the first to weigh all his reactants and products carefully. Out of 4.3318 grams of pure red substance he obtained 4.0118 grams of pure mercury. 1. How many moles of mercury were formed in the decomposition? 2. Assuming the number of moles of the red substance to be the same, what is its molar mass? 3. What compound was the red substance therefore? 4. Why can you be sure that mercury was not the only decomposition product? 5. What other decomposition product was formed from the red solid? 6.
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