Warm Ups Stoichiometry

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Presentation transcript:

Warm Ups Stoichiometry

Warm Up-Wednesday January 25, 2017 You performed chemical analysis on a substance containing copper and zinc. You discovered that a 2.8 g sample contained 0.5 g of copper. What is the percent of copper and zinc in the substance? How many moles of copper and zinc are there?

Warm Up-Thursday January 26, 2017 If a sandwich requires 2 slices of bread, 3 slices of turkey, and 1 packet of mayo…How many sandwiches can you make if you have 8 slices of bread, 7 slices of turkey, and 5 packets of mayo? What do you have left over?

Warm Up-Friday January 27, 2017 Balance the following reaction: _____Fe(OH)3  _____Fe2O3 + _____H2O What is the ratio of Fe(OH)3 to H2O?

Warm Up-Monday January 30, 2017 How many moles of sodium chloride can be produced from the reaction of 2.65 moles of sodium with excess chlorine gas? _____Na + _____Cl2  _____ NaCl

Warm Up-Tuesday January 31, 2017 How many moles of barium sulfate can be produced from the reaction of 5.68 grams of copper (I) sulfate with excess barium chloride? _____Cu2SO4 + _____BaCl2  _____ BaSO4 + ____CuCl

Homework check: Mole-Mass Conversions 0.883 mol H2 1870 g Ag2SO4 0.250 mol CsOH 0.141 mol KNO2 381 g Cu 0.321 mol ZnF2 1.48 mol NaOH

Warm Up-Wednesday February 1, 2017 In an experiment, you reacted 2.25 grams of zinc metal with excess hydrochloric acid. How many grams of zinc chloride can you produce? ___Zn + ___HCl → ___ ZnCl2 + ___ H2

Warm Up-Thursday February 2, 2017 Lab Day-No Warm Up

Warm Up-Friday February 3, 2017 How many moles of aluminum hydroxide can be produced by the synthesis reaction of 52.61 grams of aluminum oxide with excess water? ____Al2O3 + ____H2O → ____Al(OH)3

Warm Up-Monday February 5, 2017 Define precipitate in your own words. What was the precipitate in the lab from Thursday? How is this denoted in a chemical reaction?

Warm Up-Tuesday February 7, 2017 If a car requires 4 tires and 1 car body, how many cars could you make if you had 28 tires and 60 car bodies? What is the limiting reactant? What is the excess reactant? How much excess do you have?

Warm Up-Wednesday February 8, 2017 Determine the percent yield of Al(OH)3 if you reacted 7.68 grams of Al2O3 with excess water and produced 10.5 grams of Al(OH)3 ____Al2O3 + ____H2O → ____Al(OH)3

Warm Up-Wednesday February 8, 2017-Part 2 (: The table shows the mole ratios of As2O3 and C combined to form carbon dioxide and arsenic. In which trial is the amount of carbon the limiting reactant? 2 As2O3 + 3 C  4 As + 3 CO2 Trial Number Moles AgI Moles Na2S 1 10 3 2 14 8

Review Game-Quizizz 1. Open https://join.quizizz.com in your browser 2. Enter the 6-digit game code 451650 , and click "Proceed" 3. Now enter your name and click "Join Game!" 4. You will get an avatar, and then see a "Start Game" button. Click it to begin!