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Empirical Formula Candy Lab
In this lab, you will be a chemist in a candy company. You have developed a new candy product made up of Hersey Kisses and Reese's bells. You will be massing out certain amounts of these candies to see if you have certain number ratio of them, i.e. Empirical formula (EF) or KxRy. In essence, you are determining the subscript for the chemical formula of this new candy product.
From your research, you have determined that the new candy product has a percent composition of 49% Kisses and 51% Reeces. Since these are percentages, you need a total mass to assume. You will assume a total mass of 36.5g (weigh to the tenth place).
You will first calculate the actual mass of each candy you need to weigh, then weigh them out on a scale. Finally, you will determine the number ratio (simplest) of the Kisses to Reeces and give the "correct Empirical Formula".
Directions
1. In the space below, calculate the grams of Kisses and Reeses you need to weigh out.
2. Go into lab, mass out the correct grams of each candy.
- Make sure to zero balance.
- You will not use the tenth part of scale so put a piece of tape over this part.
3. Then count the number of kisses you weighed out and then the number of Reeses.
4. Determine the simplest ratio of these candies and give the "correct Empirical Formula".
Calculations
Mass of Kisses:
Mass of Reeses:
Total Number of Kisses weighed out:
Total Number of Reeses weighed out:
Simplest ratio and show "correct Empirical Formula"