Stoichiometric Calculations

Stoichiometric Calculations
paly

This article by Pearson Education Inc. focuses on stoichiometric calculations, which involve using the coefficients in a balanced chemical equation to determine the mole ratios of reactants and products. Starting with the mass of

  • Uploaded on | 3 Views
  • polyan polyan

About Stoichiometric Calculations

PowerPoint presentation about 'Stoichiometric Calculations'. This presentation describes the topic on This article by Pearson Education Inc. focuses on stoichiometric calculations, which involve using the coefficients in a balanced chemical equation to determine the mole ratios of reactants and products. Starting with the mass of. The key topics included in this slideshow are . Download this presentation absolutely free.

Presentation Transcript


Slide1© 2012 Pearson Education, Inc.Stoichiometric Calculations The coefficients in the balanced equation give the ratio of  moles  of reactants and products.

Slide2© 2012 Pearson Education, Inc.Stoichiometric Calculations Starting with the mass of Substance A, you can use the ratio of the coefficients of A and B to calculate the mass of Substance B formed (if it’s a product) or used (if it’s a reactant).

Slide3© 2012 Pearson Education, Inc.Stoichiometric Calculations Starting with 1.00 g of C 6 H 12 O 6 … we calculate the moles of C 6 H 12 O 6 … use the coefficients to find the moles of H 2 O… and then turn the moles of water to grams. C 6 H 12 O 6  + 6 O 2     6 CO 2  + 6 H 2 O

Slide4© 2012 Pearson Education, Inc.Limiting Reactants

Slide5© 2012 Pearson Education, Inc.Limiting Reactants • The  limiting reactant  is the reactant present in the smallest stoichiometric amount. – In other words, it’s the reactant you’ll run out of first (in this case, the H 2 ).

Slide6© 2012 Pearson Education, Inc.Limiting Reactants In the example below, the O 2  would be the excess reagent .

Slide7© 2012 Pearson Education, Inc.Theoretical Yield • The  theoretical yield  is the maximum amount of product that can be made. – In other words, it’s the amount of product possible as calculated through the stoichiometry problem. • This is different from the  actual yield,  which is the amount one actually produces and measures.

Slide8© 2012 Pearson Education, Inc.Percent Yield One finds the  percent yield  by comparing the amount actually obtained (actual yield) to the amount it was possible to make (theoretical yield): Percent yield = x 100 actual yield theoretical yield