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In the first experiment we noticed how Phenolphthalein, thiosulfate and copper (II) sulfate changed their physical properties once mixed with NaOH, Iodine and Ammonia
Member rating: No Rating | Words: | Submitted: Thu Nov 24 2005
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EXPERIMENT REPORT #5 LIMITING REACTANTS: HOW MUCH BaSO CAN WE MAKE Submitted by: Ioana Hordoan Date Submitted: 2005 I. INTRODUCTION A chemical reaction is a change that takes place when two or more substances (reactants) interact to form new substances (products). In a chemical reaction, not all reactants are necessarily consumed. One of the reactants may be in excess and the other may be limited. The reactant that is completely consumed is called limiting reactant, whereas unreacted reactants are called excess reactants. Amounts of substances produced are called yields. The amounts calculated according to stoichiometry are called theoretical yields whereas the actual amounts are called actual yields. The actual yields are often expressed in percentage, and they are often called percent yields. In this experiment we combined sulfuric acid and aqueous barium chloride to produce a precipitate, barium sulfate and hydrochloric acid. The precipitation was isolated by filtration and theoretical yield was calculated. We...
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