Mendelian lab graph


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electrolytes and conductivity lab

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Today in chemistry, we used pennies, a vinegar-water-salt solution, matboard to construct a battery to power an LED light. We started by first collecting five pennies and shaved the copper off of the tails side. We then created a vinegar/salt solution in which we dipped the matboard into. To construct our battery, we would place a penny shaved side up, then place a soaked piece of matboard on top of it. Finally we placed an unshaven intact penny at the top of the stack and place an LED on each end of our battery. Our end result lit up, causing us to then question the factors that caused this. for example, we placed more pennies onto the battery which ultimately made the LED light up brighter. In this lab I think that the solution soaked onto the matboard was a source of chemical energy and conductivity through acetic acid, sodium, chloride, and water, which was converted into an electrical current and passed through the pennies zinc and copper makeup, then finally through the lea...
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Reactivity of Metals

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Sodium Calcium Lithium Start color for all elements All elements total  Aluminum and Magnesium Analysis - From this lab I learned that different elements have different reactions when placed in an acidic solution. Sodium and Lithium reacted the fastest quickly changing the color from an acid which is red to a base which is the color blue. The other 2 elements, Magnesium and Calcium took much longer but eventually turned the red liquid to blue. Aluminum never turned from red to blue.  What causes this reaction is when an element is placed in the acidic solution causing it to loose one of its valence electrons. What went wrong - first the lab took a very long time to actually record all the results a total of three days. Second the lab was very dangerous. Third there was unmeasured amounts of each element throwing off some of the accuracy.
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