Opener 111 Balance the following Write a chemical

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 1. If you have 2 moles of HCl how many moles do you have of H 2 O? 2. If you have 1. 5 moles of Pb(OH)2 how many moles do you have of H 2 O? 2 2

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 (H 2 O)? 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 1. 2. If you react 36. 8 grams of HCl how many grams could you make of Pb. Cl 2? Step 1. grams HCl moles HCl Step 2. moles HCl moles Pb. Cl 2 Step 3. moles Pb. Cl 2 grams Pb. Cl 2 If you made 292 grams of Pb. Cl 2 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 C 8 H 18 how many moles will be produced of water (H 2 O)?

Test Modification Question 3 If you have Version A: _______Na. Cl + _______F 2 _____Na. F + _____Cl 2 If you have Version B: _____KBr + _____I 2 _______KI + _______Br 2