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Dependence of the reaction velocity on the type of substance I

Dependence of the reaction velocity on the type of substance I

Item no.: P1149100

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Principle

According to the fundamental laws of chemistry, a chemical reaction starts spontaneous when the reaction is exothermic, that means energy (usually in the form of heat) is released to the environment.

The reaction rate depends on the reaction temperature and the concentration of the starting materials (an increase in the reaction temperature or the concentration of the starting materials leads to an increase in the reaction rate).

But this experiment demonstrates that for the same temperature  same concentration and comparable reacting surface area of ​​the starting materials, a difference in the reaction rate can be observed. For this purpose, magnesium or zinc is reacted with concentrated hydrochloric acid and the resulting amount of hydrogen (formed by the reaction) is examined). Although the reaction temperature, concentration of starting material and surface area of ​​the starting materials are (almost) the same, the reaction of magnesium with hydrochloric acid proceeds significantly faster. Due to its position in the electrochemical series of elements, magnesium has a more negative potential than zinc . This is the reason why magnesium reacts faster with hydrochloric acid than zinc.

 

What you can learn about

  • reaction rate
  • different electrochemical potentials lead to different reaction rates
  • reaction of metals with acid

 

Device Name Item no. Qty
Three neck round bottom flask, 100 ml MAU-27220501 1,00
Magnetic stirrer without heating, 3 ltr., 230 V 35761-99 1,00
Magnesium, ribbon, roll, 25 g 30132-00 1,00
Support rod, stainless steel, l = 600 mm, d = 10 mm 02037-00 2,00
Gasket for GL25, 8mm hole, 10 pcs 41242-03 1,00
Right angle boss-head clamp 37697-00 2,00
Wash bottle, plastic, 500 ml 33931-00 1,00
Precision Balance, Sartorius ENTRIS623-1S, 620 g / 0.001 g 49294-99 1,00
Glass rod,boro 3.3,l=300mm, d=7mm 40485-05 1,00
Beaker, DURAN®, tall form, 150 ml 36003-00 1,00
Hydrochloric acid 37 %, 1000 30214-70 1,00
Gas-syringe holder with stop 02058-00 1,00
Magnetic stirring bar 15 mm, cylindrical 46299-01 1,00
Universal clamp 37715-00 1,00
Funnel, glass, top dia. 50 mm 34457-00 1,00
Gas syringe, 100 ml, with 3-way cock 02617-00 1,00
Scissors, straight,180 mm 64798-00 1,00
Tweezers,straight,blunt, 200 mm 40955-00 1,00
Graduated cylinder, Borosilicate, 100 ml 36629-00 1,00
Syringe 10ml, Luer, 10 pcs 02590-03 1,00
Magnetic stirring bar 30 mm, cylindrical 46299-02 1,00
Cork rings for flasks 10-100ml 38554-00 1,00
Separator for magnetic bars 35680-03 1,00
Stop clock, demo.; diam. 13 cm 03075-00 1,00
Support base DEMO 02007-55 1,00
Closure caps,10, GL25 41221-03 1,00
Glass tube, straight, l=80 mm, 10/pkg. 36701-65 1,00
Zinc, granul., 99.5%, 500 g 31998-50 1,00
Cannula 0.9x70mm, Luer, 20 pcs 02597-04 1,00
Magnetic stirring bar, 50 mm, cylindrical 46299-03 1,00
Rubber tubing, i.d. 6 mm 39282-00 1,00
Water, distilled 5 l 31246-81 1,00
Document     Filesize
p1149100e.pdf Experiment discription, English 259.05 KB

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