1 / 9

Stoichiometry

Stoichiometry. Involves the mass relationships between reactants and products in a chemical reaction. Problem Type 1. Given and unknown quantities are amounts in moles. This is a mol  mol calculation.

peigi
Download Presentation

Stoichiometry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Stoichiometry Involves the mass relationships between reactants and products in a chemical reaction.

  2. Problem Type 1 • Given and unknown quantities are amounts in moles. • This is a mol  mol calculation. • To solve these problems you need the moleratio = a conversion factor that relates the amounts in moles of any two substances in a chemRxn.

  3. Example • Ammonia, NH3, is widely used as a fertilizer and as an ingredient in many household cleaners. How many moles of ammonia are produced when 6 mol of hydrogen gas react with an excess of nitrogen gas? H2 + N2NH3

  4. Problem Type 2 • Given is in moles and unknown is expressed in grams (mass). • This is a mol  mol  mass conversion calculation.

  5. Example • When magnesium burns in air, it combines with oxygen to form magnesium oxide according to the following equation 2Mg + O2 2MgO What mass is grams of MgO is produced from 2 moles of Mg?

  6. Problem Type 3 • Given is a mass in grams and unknown is in moles. • This is a mass  mol  mol calculation.

  7. Example • Oxygen was discovered when heated mercury (II) oxide decomposed to form its constituent elements. How many moles of HgO are needed to produce 125 g of oxygen, O2?

  8. Problem Type 4 • Given and unknown amounts are in grams (mass). • This is a mass  mol  mol  mass calculation.

  9. Example • When copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. What mass of silver is produced from 100g of Cu?

More Related