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 . and Stoichiometry. Mole Ratio. Recall:. The coefficients . of a balanced chemical equation give the mole ratio of one chemical . to another. We can use these numbers to predict the number of moles of product produced. 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. 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,. Guiding Questions. How are dosages determined? . How are toxins measured and controlled?. . Which is better: eating beans and rice at separate meals . or together?. . Table of Contents. ‘Stoichiometry’. The Arithmetic of Equations. Section 1. Section 1 Learning Targets. 12.1.1 – I can explain how balanced equations apply to both chemistry and everyday life.. 12.1.2 – I can interpret balanced chemical equations in terms of moles, representative particles, mass, and gas volume at STP.. Using ratios of balanced reactions to manipulate the chemical variables in these reactions. Calculators, reference tables, notes.. Get your thinking caps on!. For every single chemical reaction that’s balanced, we can determine the . A Dozen Elephants & . A Dozen Paper Clips. Would a dozen of each weigh the same amount? Give a reason for your answer.. Moles and Mass. The molar mass gives us the relationship between the number of moles and the mass of an element or compound.. 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.. Chapter Objectives. Describe the chemical processes used in biomass production and conversion to biofuels.. Explain balancing a chemical reaction as an application of the . law of conservation of mass. 23 . particles. . So a “mole” is a number, very similar to a dozen. . A dozen = 12 . A mole (mol) = 6.022 x 10. 23. It can be found in your reference packet on page one. Avogadro’s number = 6.022 x 10. Concept 1 2¥ One mole of NaCl contains 6.022 x 10 NaCl formula units.¥ Use the mole quantity¥x23 ¥ The mass of an atom in amu¥; .g/amu = 1.674 x10-24 gMass of 1 mole of H atoms: 1.674 x10-24H 4.2: Classifying chemical reactions. Define three common chemical reaction types: . (1) precipitation; (2) neutralization; (3) redox. Classify reactions given a balanced chemical equation. Identify common acids & bases. 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..