05_07_journal.doc - Chemistry Journal 5.7 Honors...

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Chemistry Journal5.7Honors StoichiometryDriving Question:How can data analysis of percent yield and amount of excess reactant helpscientists make decisions about chemical production?Key Ideas andTermsNotesFQ: How can you find the leftover amount of excess reactant in a chemical reaction?If 30.0 grams of sulfuric acid react with 26.0 grams of aluminum hydroxide in a doublereplacement reaction, how many grams of water can be produced? How many grams of theexcess reactant will be left over at the end of the reaction?H2SO4+ Al(OH)3→ H2O + Al2(SO4)3Step 1:1:Write the balanced equation for the reaction.3H2SO4+ 2Al(OH)3→ 6H2O + Al2(SO4)3Step 2:2:Identify all important information provided in the word problemor data table.1.30.0 grams of sulfuric acid H2SO42.26.0 grams of aluminum hydroxide Al(OH)33.Find grams of water produced4.Find grams of excess reactant left over5.6.7.Step 3:3:Determine the limiting and excess reactants of the reactionusing stoichiometry calculations.

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