PPT-Stoichiometry: Limiting and Excess Reagents

Bon Appetite Suppose you are a chef preparing F rench toast for a group of people You make French toast the way you have always made it one egg for every three slices of bread You never waiver from this recipe because the French toast will be either too soggy or too dry There are 8 eggs and 30 slices of bread in the pantry. Aas long as organisms have all of these things available to them their population will continue to grow However populations cannot grow forever Some form of environmental resistance will stop the population s growth The form of environmental resis Balancing Hints:. Balance the metals first.. Balance the ion groups next.. Balance the other atoms.. Save the non ion group oxygen and hydrogen until the end.. Balance . the following equations;. __Ca . (aka limiting reagent). Excess Reactant. Theoretical, Actual, and Percentage Yield. Limiting Reactant. (aka limiting reagent). Limiting reactant. : The substance you run out of first, that is consumed first--The reactant that . BIOLOGY. Limiting Factors . Limiting factor: . Anything that prevents a population from growing too . large. Examples? Discuss . Space (disease, predation). Sunlight. Competition (food, water, mates). Reactants. Suppose that you are in a car factory. . In . order to assemble a car, 4 tires and 2 headlights are needed (among other things). . In . this example, imagine that the tires and headlights are reactants while the car is the product formed from the reaction of 4 tires and 2 . vocab. Limiting reactant- the one that runs out first, limits the amount of product that can be made. Excess- the one with reactant leftovers, not used up completely. What it looks like. C + O. 2. = CO. 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,. During a chemical reaction, the amount of each reactant will determine how much product is formed.. The . limiting reagent. is the reactant that is . used up first . in the reaction, thus determining when the reaction stops.. If it takes 500 bricks and 1000 boards to make a house, how many houses can you make from 1600 bricks and 2000 boards?. 2 houses, there are enough bricks for 3.2 houses. but only boards for 2 with our plans (reaction).. 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’. Things you should know so far…. Energy transfer – endothermic vs. exothermic. Energy diagrams . Internal energy (including work). Heat equation. Calorimetry. and conservation of energy. Molar enthalpy. 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?. Adjusting To Reality. This . is not the . entire. . story. In reality, you . never. . have the . exact. . amounts of . both. reactants you need. At the . end. . of the reaction, one reactant has been . 2. .. 2.) How many moles are there in 63.2g of Cl. 2. ?. 60.4L O. 2. . 22.4L O. 2. . 1 mol O. 2. . = 2.7 mol O. 2. 63.2g Cl. 2. 70g Cl. 2. 1mol Cl. 2. = 0.903mol Cl. 2. Ch. . 9. Math In Chemistry.