PPT-Moles, Formulas, Reactions & Stoichiometry

Lecture 3 Topics Brown chapter 3 1 Moles 34 Molecular mass aka molecular weight 33 2 Molar converstions Percent composition 33 Empirical formulas . Gas Stoichiometry. Recall:. The law . of combining volumes . W. hen . gases react, the volumes of the reactants and products react in whole. -number . ratios if the temperatures and pressures are constant. . 6. 3-. (. aq. ) + JO. 2. -. (. aq. ) .  J. 2. O. 7. 2-. (. aq. ) + Z. 7. O. 4. 3+. (. aq. ) . 68H. +. (. aq. ) + . 41e. -. +7 . Z. 2. O. 6. 3-. (. aq. ) .  2Z. 7. O. 4. 3+. (. aq. ) + 34. H. 2. Step-by-Step Mass to Mole. What is Stoichiometry. Stoichiometry is the study of the relationships or ratios between two or more substances undergoing a physical or chemical change. We will be taking steps to solve the different equations. It’s a process that allows us to mathematically convert and calculate the relationships between the amount of reactants and products in a chemical reaction.. Graphical representation . Example: . for every O2 molecule,. THE MOLE. Mole. -The . number of C atoms in exactly 12.0 g of carbon., also a number 6.022 x 10. 23. Avogadro’s number . 6.022 x 10. 23. , the number of . particles. in a mole of . anything. More on the mole later……. Chocolate Chip Cookies. Cookie Recipe . 1.5 c sugar. 1 c. butter. 3 eggs. 2.25 c. flour . 2 c. chocolate chips . makes 25 cookies. Using the following recipe, complete the questions. . . If you have 6 c. of sugar, how many eggs will you need to use all of it?. The Review!. (you need a periodic table, piece of scrap paper, and calculator). Review Game Rules. I will ask a question to the class.. Each participant (that’s you) . writes down. the answer silently.. By: Skye Smith. What is Mass?. Mass can be defined as a quantitative measure of an object's resistance to the change of its speed. . Scientifically speaking, mass IS different than weight, which is the measure of a planet’s gravitational force on an object. Stoichiometry Unit Objectives. Solve reaction stoichiometry problems:. Mole- Mole. Mass – Mole. Mass-Mass. Mass Volume. Introduction. In any stoichiometry problem we start with a given quantity of a reactant or product. We use conversion factors and unit analysis to determine the quantities of the unknowns that react or form.. Roles:. Player 1. : . set up problem and work through first conversion factor. Player 2. : . work through second conversion factor (if there is one). Player 3. : . work through third conversion factor (if there is one). Limiting reactants. Percentage yield. Stoichiometry Problems. How many moles of KClO. 3. must decompose in order to produce 9 moles of oxygen gas? . = 6 mol KClO. 3. Problem: X mol. KClO. 3. . Writing and balancing Chemical Equation. Classifying Chemical Reactions:. Precipitation Reactions. Acid-base Reactions. Decomposition Reactions (nonredox). Oxidation-Reduction Reactions. Reaction Stoichiometry. 1. Identify the species present in the combined solution, and determine what reaction occurs..  2. Write the balanced net ionic equation for the reaction..  3. Calculate the moles of reactants..  4. Determine which reactant is limiting.. 2017 . P3 Challenge – . Determine the . number of Mg atoms in 0.35 g of . MgO. .. Today’s Objective –. Stoichiometry. Assignment: . Stoichiometry Worksheet. Agenda. Hmk. . Review. Moles and Reactions.