Opener 1/11 Balance the following: Write a chemical equation from the following then balance:

Chemical Calculations Calculate from mole to mole and mass to mass

Going from Mole to Mole!!  

Practice Problems If you have 2 moles of HCl how many moles do you have of H2O? If you have 1.5 moles of Pb(OH)2 how many moles do you have of H2O? 2 2

Mass to Mass Calculations 2 2 Mass to Mass Calculations How can you go from the mass of one substance to the mass of another using a balanced chemical equation? Example: 62 grams of HCl reacts to produce how many grams of water (H2O)? STEP 1 Mass of Substance A to moles A (Divide by the molar mass) STEP 2 Moles of Substance A to moles of Substance B (Mole ratio) STEP 3 Moles of Substance B to mass of substance B (Multiply by the molar mass)

Practice Problems If you react 36.8 grams of HCl how many grams could you make of PbCl2? Step 1. grams HCl moles HCl Step 2. moles HCl moles PbCl2 Step 3. moles PbCl2  grams PbCl2 If you made 292 grams of PbCl2 how much HCl did you start with? 2 2

1/12 Opener Balance the following equation: If you have 3.2 moles of the reactant C8H18 how many moles will be produced of water (H2O)?

Test Modification _______NaCl + _______F2  _____NaF + _____Cl2 Question 3 If you have Version A: _______NaCl + _______F2  _____NaF + _____Cl2 If you have Version B: _____KBr + _____I2 _______KI + _______Br2