Mole Relations in Chemical Equations Students will learn how to predict the mass of products expected in a chemical reaction

Review: Finding the moles from the grams 7.0 grams Na2SO4 = __________ moles 30.0 grams KMnO4 = __________ moles 17.0 grams PCl3= __________ moles

Review: Finding the grams from the moles 1.5 mole NaCl = __________ grams .0165 mole K2SO4 = _________ grams 1.25 mole Cu(NO3)2 = ________ grams

Hydrogen and Oxygen React. How much water will be produced? The reaction between hydrogen and oxygen can be read a couple different ways. 2H2 + O2  2H2O Two molecules of hydrogen react with one molecule of oxygen Two moles of hydrogen react with one mole of oxygen

N2 + 3H2  2NH3

2H2 + O2  2H2O How many moles of oxygen do you need in the examples below? 12 mol of hydrogen ____________ 25 mol of hydrogen ____________

Balance the equation (NH4)2Cr2O7  Cr2O3 + N2 + H2O So this means that: 1.00 mole (NH4)2Cr2O7 produces ___ mole H2O 0.50 mole (NH4)2Cr2O7 produces ___ mole H2O

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Calculations (NH4)2Cr2O7  Cr2O3 + N2 + 4H2O 25.2 g ↓ g g g 252 g/mol 152 g/mol 28 g/mol 18 g/mol (NH4)2Cr2O7  Cr2O3 + N2 + 4H2O 25.2 g ↓ g g g mole mol mol mol

H2O2  H2O + O2 34 g/mol 18 g/mol 32 g/mol H2O2  H2O + O2 68 grams mol mol mol

Fe + Cl2  FeCl3 55.8g/mol 71.0 g/mol 162.3 g/mol Fe + Cl2  FeCl3 3.0 ____ _____ ____ ____ _____