Using a balanced equation to convert units of a chemical. Stoichiometry Using a balanced equation to convert units of a chemical. Venetia Collier

Stoichiometry Building our Basic Cards Card 1 front g mol Hint: from periodic table Card 1 back mol g Hint: from periodic table

mol ratio 1 mol ratio 2 mol ratio 2 mol ratio 1 Making Card 2 Card 2 front mol ratio 1 mol ratio 2 Hint: from balanced equation Card 2 back mol ratio 2 mol ratio 1 Hint: from balanced equation

1 mol 1 mol 6.02x1023 6.02x1023 Making Card 3 Atoms, molecules or ions Card 3 front 1 mol 6.02x1023 Atoms, molecules or ions Card 3 back 6.02x1023 Atoms, molecules or ions 1 mol

1 mol 22.4 L 22.4 L 1 mol Making Card 4 Hint: gas at STP Card 4 front 1 mol 22.4 L Hint: gas at STP Card 4 back 22.4 L 1 mol Hint: gas at STP

Using cards to solve a 1 step problem Given 3.5 moles of sodium chloride, how many grams do you have? Step 1: Start with the given from the problem. 3.5 mol NaCl

Using cards to solve a 1 step problem Given 3.5 moles of sodium chloride, how many grams do you have? Step 2: Pick 1 of your 4 cards which will allow you to cross cancel units. Which card is it? Card 1 front side g mol

Using cards to solve a 1 step problem Step 3: Place in grid for 1 step problem.

Using cards to solve a 1 step problem Step 4: Multiply and divide. Answer= 200g NaCl

Using cards to solve a 2 step problem Given 18 grams of water, how many molecules do you have?                                                                     Step 1: Start with the given. 18 g H2O

Using cards to solve a 2 step problem Step 2: Pick your first card making sure you can cross cancel units. Your first card should be mol g Step 3: Place in 2 step grid. 18g H20 1 mol H20 18.016 g H20

Using cards to solve a 2 step problem Step 4: Pick another card to cross cancel units then place in grid. What card do you use? 6.02 x 1023molecules 1 mol

Using cards to solve a 2 step problem Step 5: Multiply and divide. Answer: 6.02 x 1023 H2O molecules