1 / 21

Balancing Chemical Equations and Calculating Mass of Reactants

This guide explains how to write balanced chemical equations, count the number of atoms on each side, and calculate the mass of reactants. It includes a step-by-step process for determining atomic masses using the periodic table, specifically for potassium (K), chlorine (Cl), and oxygen (O). By following the examples provided, learners will practice counting atoms and summing atomic masses to find the total mass of reactants in chemical reactions, ensuring accurate representations in chemical equations.

brandon-gray
Télécharger la présentation

Balancing Chemical Equations and Calculating Mass of Reactants

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. First, write the equation.

  2. Count the number of atoms on each side of the equation. K - _____ Cl - _____ O - _____ K - _____ Cl - _____ O - _____

  3. Count the number of atoms on each side of the equation. 1 K - _____ Cl - _____ O - _____ K - _____ Cl - _____ O - _____ 1 = 1 1 = 3 2

  4. Count the number of atoms on each side of the equation. 2x3=6 2 1 2 K - _____ Cl - _____ O - _____ K - _____ Cl - _____ O - _____ 1 = 1 2 1 = 3 6 2

  5. Count the number of atoms on each side of the equation. 2 2 1 2 K - _____ Cl - _____ O - _____ K - _____ Cl - _____ O - _____ 1 2 = 1 2 1 2 = 3 6 2

  6. Count the number of atoms on each side of the equation. 3x2=6 2 2 3 1 2 K - _____ Cl - _____ O - _____ K - _____ Cl - _____ O - _____ 1 2 = 1 2 1 2 = 3 6 2 6

  7. Count the number of atoms on each side of the equation. 2 2 3 1 2 K - _____ Cl - _____ O - _____ K - _____ Cl - _____ O - _____ 1 2 = 1 2 1 2 = 3 6 2 6 =

  8. To find the mass of the reactants: • Find each element on the Periodic Chart • Find the Atomic Mass for each element • Add the atomic mass for each atom to get the total mass for the reactants

  9. 78 K (potassium) has an atomic mass of 39. K (potassium) has an atomic mass of 39. There are 2 K (potassium) atoms. There are 2 K (potassium) atoms. 2x39= 78 2x39= 78

  10. 78 +70 Cl (chlorine) has an atomic mass of 35. There are 2 Cl (chlorine) atoms. 2x35= 70

  11. 78 +70 +96 2x3=6 O (oxygen) has an atomic mass of 16. There are 6 O (oxygen) atoms. 6x16= 96

  12. 78 +70 +96 =244

  13. 244

  14. 244

  15. 78 K (potassium) has an atomic mass of 39. There are 2 K (potassium) atoms. 2x39= 78

  16. 78 +70 =148 Cl (chlorine) has an atomic mass of 35. There are 2 Cl (chlorine) atoms. 2x35= 70

  17. 148 96 3x2=6 O (oxygen) has an atomic mass of 16. There are 6 O (oxygen) atoms. 6x16=96

  18. 148 96 148+96=244

  19. 244 244 YES

More Related