{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

11-21-07%20-%20Lecture%2016%20-%20Fund%20H%2cI%2cJ

11-21-07%20-%20Lecture%2016%20-%20Fund%20H%2cI%2cJ -...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemical Reactions
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Law of Conservation of Mass Because the same atoms are present in a reaction at the beginning and at the end, the amount of mass in a system does not change. chemical equations must be balanced they must have the same number of atoms of the same kind of atom on both sides stoichiometric coefficients 2 H 2 (g) + O 2 (g) → 2 H 2 O (g)
Image of page 2
Meaning of Chemical Equations 4 Al (s) + 3 O 2 (g) → 2 Al 2 O 3 (s) This equation means: 4 Al atoms + 3 O 2 molecules give 2 units of Al 2 O 3 BUT it also means: 4 moles of Al + 3 moles of O 2 give
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Chemical Equations Chemical Equations To write a chemical reaction, you need to know: 1. All the reactants and their formulas 2. All the products and their formulas 3. The states of the reactants and products (g) for gas, (l) for liquid, (s) for solid, (aq) for aqueous (water) solution 1. Is there a catalyst involved? Or is a high temperature required? 2. Stoichiometric coefficients identifying the relative amounts of each compound
Image of page 4
There is no one correct way to balance equations.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern