Magnesium is an alkaline earth metal that has the symbol Mg. Magnesium is a fairly strong, silvery-white, light-weight metal (one third lighter than aluminum). In a powder, it heats and ignites when exposed to moisture and burns with a white flame that is harmful to the eyes. It is difficult to ignite in bulk, but once ignited, it is difficult to extinguish. Magnesium Ribbon is a long strip of magnesium metal about 3 millimeters wide and 10 meters long with a thickness of about 0.03mm, and weight of about 25 grams. Hydrochloric acid is a solution of 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,descaling, and leather processing. Hydrochloric acid is corrosive to the eyes, skin, and mucous membranes.
Focus Question: How does the molarity of the Hydrochloric Acid effect the reaction time of the Magnesium? Hypothesis: If the molarity of the Hydrochloric acid increases, then the reaction time of the Magnesium will decrease.
Variables: Manipulated - Concentration of HCl
Responding - Reaction time of HCl and Mg
Controlled - Size of Mg piece, amount of HCl in test tube, room temperature, method of agitation.
Materials List: 1. Test tube rack 2. Graduated Cylinder (10mL) 3. 3 Test Tubes 4. 50 mL beaker 5. 250 mL flask (for the HCl) 6. Dropper 7. Stopwatch 8. 17cm strip of Magnesium Ribbon 9. HCl (.5 molarity) 10. HCl (1 molarity) 11. HCl (2 molarity) 12. Goggles 13. Scissors/Knife (for cutting Mg)
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 HCl (.5...