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PHET Simulation Worksheet (1)

PHET Simulation Worksheet (1)

Q Part One: (15 points total – 5 points for each level) 1. Go to the ‘Reactants, Products, and Leftovers’ PhET simulation here: https://phet.colorado.edu/en/simulation/reactants-products-and-leftovers 2. Play around with the ‘sandwiches’ and ‘molecules’ categories to get a feel for the simulation. 3. Once you feel comfortable, click on the ‘game’ category and complete levels 1, 2, and 3. 4. Submit screenshots/photos noting that you successfully completed levels 1, 2, and 3. You must score 10 out of 10 on each level to receive full points for Part One. Note: you have unlimited attempts for each level to score 10 out of 10. 1. From the PhET simulation, an example using cheese and bread to make sandwiches is used to illustrate the concept of limiting reagents. (See below) a. If you have 3 pieces of bread and 1 slice of cheese, which is the limiting ‘reagent’? How many ‘leftovers’ do you have? Explain your answer. (5 points) 2. According to the above equation, you need 2 pieces of bread and 1 slice of cheese to make 1 sandwich. We can assume that if you had 6 pieces of bread and 3 slices of cheese, you’d be able to make 3 sandwiches. This is known as the theoretical yield. a. Now let’s say you got hungry while making the sandwiches and ate one of the slices of cheese. Now you have 6 pieces of bread and 2 slices of cheese. What is the percent yield? Show your work. (5 points) 3. Consider the following reaction, if you have 22.1 g of C6H6 react with 53.0 g of Br2: C6H6 + Br2 C6H5Br + HBr a. Calculate the moles of each reagent and determine the limiting reagent. (5 points) b. Using the moles of limiting reagent and the stoichiometric ratio given by the chemical equation above, calculate the moles of product. (5 points) 4. From the grams of product you calculated, determine the percent yield if the actual yield of C6H5Br is 43.6 g. (5 points)

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Answer: Cheese is limiting reagent here. One bread is leftover here.Answer: In this case, I can make 2 pieces of sandwich and my experimental yield is = 2 Whereas my theoretical yield is = 3