Hydrochloric acid is a solution f hydrogen chloride in water, that is a highly corrosive, strong mineral acid with many industrial uses. It is found naturally in gastric acid. Hydrochloric acid is used in the chemical industry, and in the production of chlorides, fertilizers, and dyes, and in the photographic, textile, and rubber industries. It has smaller-scale applications, including household cleaning, production of gelatin and other food additives,decaling, and leather processing, Hydrochloric acid is corrosive to the eyes, skin, and mucous membranes.
Focus Question: How does the military of the Hydrochloric Acid effect the action time of the Magnesium? Hypothesis: If the military of the Hydrochloric acid increases, then the reaction time of the Magnesium will decrease. Variables: Manipulated – Concentration of HCI Responding – Reaction time of HCI and MGM Controlled – Size of MGM piece, amount of HCI in test tube, room temperature, method of agitation. Materials List: I. Test tube rack 2.
Graduated Cylinder (ml) 3. 3 Test Tubes 4 SO ml beaker 5. 250 ml flask (for the HCI) 6. Dropper 7. Stopwatch 8. CACM strip of Magnesium Ribbon 9. (. 5 military) 10.
(1 military) 11.HCI (2 military) 12. Goggles 13. Scissors/Knife (for cutting MGM) Procedure: 1. Cut the strip of magnesium into 10 mm pieces with the scissors/ knife and then hold them in the beaker. 2 Measure out 5 ml of HCI (. 5 military) with the dropper into the graduated cylinder.
3. Pour HCI (. 5) from the graduated cylinder into the test tube. 4. Put a piece of magnesium into the test tube filled with HCI, 5.
Start stopwatch when the magnesium is placed into the test tube filled with HCI (. 5) and stop it when the magnesium has dissolved (flick the bottom of the test tube periodically to make sure that the magnesium mixes ropey with the HCI). . Record your data and then dump out the HCI and wash your materials, 7, Repeat steps 2-6 with S military until you have completed S trials with it. 8 Get new test tube. 9. Repeat steps 2-6 with 1 military. 10.
Repeat steps 2-6 with I military until you completed S trials with it. II, Get a new test tube. 12.
Repeat steps 2-6 with 2 military. 13. Repeat steps 2-6 with 2 military until you hue completed 5 trials with it.
Conclusion: Fifth military of the HCI increases, then the reaction time of the Magnesium Will decrease. This hypothesis was proved to be supported. The average rate Of reaction for the HCI . military was 269. 402 seconds, for the HCI 1 military was 50.
052 seconds, and for the HCI 2 military was 15. 218 seconds. This is because according to the collision theory, in order to react particles must touch each other. With the increase of the concentration of the HCI (the introduction of more HCI particles) there is more opportunity for the HCI particles to collide with the magnesium’s molecules.
Therefore, the rate of reaction increases. Evaluation: m very confident in the overall conclusion that we reached with this lab (that an increase in military results in a decrease of reaction time).However, believe that we could hone down our results to be even more accurate. One thing that might have minutely effected the results was the rate/method of agitation of the test tubes, Each person in the group had a slightly different method and a slightly different speed at which they worked. To fix this each group would set one method before hand (whether it be tapping it against a nail, flicking it, or aping it against the table edge) and keep a fixed time in between each tap (whether it be I second or 10 seconds).Another difficulty that may have minutely effected that data was that size of the magnesium pieces.
It was hard to cut each strip into exact 10 mm increments. One way to fix this could be to buy pre-cut strips so that you don’t have to go through the hassle of cutting the magnesium yourself. Another way would be to just conduct your experiments on a larger scale so that you wouldn’t have to have smaller pieces of the magnesium at all.