Kate+&+Kevin

code Title Reactivity Lab


 * __Aim__**
 * To find out which solid reacts the most when added to the hydrocloric acid.

__Variables Table__** (Al, Zn, MG, Fe, Cu)** || **Use the same metals** || Hypothesis : If the elements are intact with the acids, then they will dissolve, but magnesium will most likely be the most reactive because it has less valance electrons. The one we think will not react as much is Aluminum because it has the most valance electrons.
 * **Type** || **What** || **How** ||
 * **Independent Variable** || **type of metal
 * **Dependent Variable** || **The reaction of the metals** || **We will put each metal into hydrochloride acid we will then examine the metals reaction with our eyes.** ||
 * **Controlled** || # **Amount of solid**
 * 1) **Amount of Acid**
 * 2) **The balloon** || # **We will use a scale to measure exaclty.**
 * 3) **We will use a graduated cylinder to measure how much acid we add.**
 * 4) **Use the same type of balloon on each test tube** ||


 * Method:**
 * 1) Gather equipment and materials.
 * 2) put on safety gear so that the acid does not hurt you.
 * 3) Mark each test tube somehow that will distinguish magnesium, zinc, aluminium, copper, and iron.
 * 4) Put 0.5 g of each metal into each testube to which it corresponds
 * 5) Pour 5 ml of hydrochloric acid into each test tube as fast as you can while still being careful
 * 6) Start the video camera and look at the time being recorded to findn out how long it takes for something to happen.
 * 7) Clean up after you have done everything right.

__**Observations Table**__

​ __Observation table showing how the balloon is inflating and how much reaction is happening__ Zn Al Fe Cu || Same Last same same Most air || Tiny bubbles Bubbles Bubbles A lot of bubbles No bubbles ||  || Zn Al Fe Cu || Most air Last Same Same Second || Tiny bubbles bubbles bubbles bubbles No bubbles || Separating
 * Time || Element || Balloon size || Bubbles || Other observations ||
 * 3min || Mg
 * 5min || Mg

Does not seem to be reacting a lot Iron changed color and turned pink || Zn Al Fe Cu || First Last hardly any air Second least filled 3rd most filled with gas Second most filled || Tiny bubbles bubbles Bubbles Bubbles No bubbles || Completely pink Does not seem to be reacting || Zn Al Fe Cu || 1 5 3 4 2 || Tiny bubbles Bubbles Bubbles Bubbles No bubbles || seems to be reacting because there are bubbles, but the balloon is not inflating || Zn Al Fe Cu || 1 4 3 2(same) 2(same) || Tiny bubbles Bubbles Bubbles Bubbles No bubbles || ||
 * 8min || Mg
 * 11min || Mg
 * 13 min || Mg


 * Equipment and Materials**
 * 5 test tubes
 * 0.5 grams of Magnesium
 * 0.5 grams of Zinc
 * 0.5 grams of Aluminum
 * 0.5 grams of Iron
 * 0.5 grams of Copper
 * 5 ml of Acid
 * 5 balloons
 * 1 Graduated cylinder
 * 1 Test tube rack
 * 1 Spoon
 * 1 Scale
 * 1 piece of tape
 * 1 Pen
 * 5 Petri dishes
 * 1 Camera

__Graph showing what ranking we gave our balloons to how inflated they were depending on the time.__
 * Graph:**

We found out that Magnesium was the most reactive, copper was the second most reactive metal, Aluminum was the 3rd most reactive, Iron second least reactive and Zinc was the least reactive. My hypothesis was that Magnesium would be the most reactive and Aluminum was the least reactive. It was almost correct because Magnesium was the most reactive but Aluminum wasn’t the least reactive it was Zinc. This supports my hypothesis idea " The greater the ease with which an element loses its electrons and acquires a positive charge, the greater is its reactivity. Further, the greater the number of shells and lesser the number of valence electrons, the greater is the reactivity of the metal. " (Tutorvista) Therefore my results show that Magnesium is most reactive- it has two valence electrons which means its easy to loose electrons and to acquire a positive charge and it has 3 shells. Which means it has less valence electrons than Aluminum which has 3 valence electrons and 3 shells. (Image from: Tutorvista) As you can see this is not was I found in my results copper was a lot more reactive in my results then in this result. Zinc is also more reactive than Iron which doesn’t support my results.
 * Conclusion**

The data received through this experiment is not very reliable as the experiment was only carried out once and therefore the final result may not be very accurate. 2. Validity – The method of collected the results of this experiment is not valid because although it related to the aim, allowed the one to obtain results that enable one to answer the aim and made the independent variables change, it still did not controlled all the constant variables. Therefore, there are many weaknesses in the method that could impact the accuracy of the results, making it invalid. **
 * Reliability –


 * Weaknesses || improvements ||
 * when we were pouring certain metals like aluminum and copper powder, they sometimes got stuck on the petri dish, and not all of it can get off. || use something next time that would take all of it off and put it in the test tube without spilling. ||
 * type of balloon, because some balloons had patterns, and that could have changed the results because of the plastic paint || keep the same type of ballon with no patterns so that the result dont vary ||

4. This experiment was a Fair Test because the Independant variable which is the type of metal was the only one that was changed throughout the experiment. Also, the dependant variable which is the reactivity of the metals was all measured in the same way.

Work Cited
 * "The Reactivity Series of Metals, Metals and Non-metals, Science Help | TutorVista." //Tutorvista.com - Online Tutoring, Homework Help for Math, Science, English from Best Online Tutor//. Web. 18 Dec. 2009. 

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