Ch. 11 - Stoichiometry Mole to Mole Conversions. The equation for a turkey sandwich might look like: 2 turkey + 1 cheese + 2 bread  1 turkey sandwich.

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Presentation transcript:

Ch Stoichiometry Mole to Mole Conversions

The equation for a turkey sandwich might look like: 2 turkey + 1 cheese + 2 bread  1 turkey sandwich 1 turkey sandwich

The coefficents in the balanced chemical equation show RELATIVE numbers of moles of each substance The coefficents in the balanced chemical equation show RELATIVE numbers of moles of each substance In other words, it is telling you the RATIO of moles In other words, it is telling you the RATIO of moles You can have more or less than the values given but they are still in the same proportion You can have more or less than the values given but they are still in the same proportion

We need these MOLE RATIOS! If you know the actual number of moles of one of the substances in the balanced equation, you can determine the number of moles of the others substances too…using the MOLE RATIO. If you know the actual number of moles of one of the substances in the balanced equation, you can determine the number of moles of the others substances too…using the MOLE RATIO.

Practice Problem #1: NH 4 NO 3  N 2 O + 2H 2 O a) You have 4.2 moles of NH 4 NO 3 reacting, how many moles of H 2 O are produced? 4.2 mol NH 4 NO 3 x ___________ =

b) How many moles of N 2 O are produced? 4.2 moles NH 4 NO 3 x ___________ =

Practice Problem #2: 2HCl + Zn  ZnCl 2 + H 2 How many moles of HCl are needed to react with 2.3 moles of Zn? 2.3 mol Zn x ___________ =

Practice Problem #3: __ C 6 H 12 O 6 + __ O 2  __ CO 2 + __ H 2 O If 3.20 mol of C 6 H 12 O 6 react, how many moles of O 2 react? C 6 H 12 O O 2  6 CO H 2 O 3.20 mol C 6 H 12 O 6 x 6 mol CO 2 = 19.2 mol CO 2 1 mol C 6 H 12 O 6 1 mol C 6 H 12 O 6