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Conductivity of Different Salt Solutions

Conductivity of Different Salt Solutions. By: Jennifer Stall Amanda Leonard Jason Toon Marina Korolis Kris Mason Dan Pellegrini. Our Goals for this Experiment. Explore the property of conductivity of solutions Formulating hypotheses, predicting relationships and gathering data

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Conductivity of Different Salt Solutions

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1. Conductivity of Different Salt Solutions By: Jennifer Stall Amanda Leonard Jason Toon Marina Korolis Kris Mason Dan Pellegrini

2. Our Goals for this Experiment • Explore the property of conductivity of solutions • Formulating hypotheses, predicting relationships and gathering data • Use mathematics to interpret graphical data • Discover the role mathematics plays in the scientific process

3. Procedure • First, we prepared 1M solutions of potassium chloride and magnesium nitrate. • We made a prediction about the conductivity of each solution • We started with a beaker -full of water, and measured the conductivity with each progressive drop • Finally, we analyzed our data

4. How to combine Math and Chemistry • Since we made graphs of conductivity vs. volume, and we found the relationship to be linear, students can easily find the slope, x- and y- intercepts, and equation of the best-fit line • We can describe a mathematical relationship between the conductivity and the number of ions in solution

5. What we would do differently next time • We discovered afterwards that using two different anions introduced another variable which invalidated our hypothesis • We should use solutions that contain the same anion but different cations (i.e. sodium chloride, calcium chloride, aluminum chloride) • For more information, refer to this lesson

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