Rates of Reaction Lab Investigation

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Chemestry Lab
Rates of Reaction

(Picture from: http://sciencespot.net/Pages/kdzchem.html)
The rate of reaction is how fast or slow a reaction is completed. This is important for factories and chemists all over the world. What happenes during a reaction is atoms or molecules that collide and form new molecules. You can affect this rate of reaction with: temperature of reactants or suroundings, surface area of reactants, if there is a catalyst present, but in theis lab the concentration was changed as the IV. The reaction rate is masured in change/time, in this case it was: volume of gass produced/minutes. Gas was measured in ml/minute, and this was the DV. Aim of lab was: To find the change in rate if reaction, depending on the concentration of hydrocloric acid. Hypothesis: If the concentration of hydrocloric acid is increased, the rate of reaction will increase and the volume of gass will increase. The reasoning behind the hypothesis is that when there are more molecules in the solution the reactants collide more often, so more product is made in a shorter periode of time. The equation was: Mg + 2HCl → MgCl2 + H2

Independent variable| Dependent variable| Controled variables| Value| How to control the CV| Concentration of acid| Rate of reaction| Vol of acid| 20 ml| Measure using a 50ml Measuring cylinder| 2 moles pr. L| Vol of gas| Temp of acid| Room temp.| Not controlled, only montored| 1 moles pr. L| | Amount of Mg| 5 cm or ribbon/ 0.07g| Ruler, and weight| 0.5 moles pr. L| | Precence of catalyst| No| Not have a catalyst| 0.25 moles pr. L| | Type of acid| Hydrocloric| Have same type of acid|

Method:
1. Gather aparatus and materials, and set up as shown in diagram below aparatus list. 2. Bucket + water
3. Measure temp, in room and water
4. Fill measuring cylinder with water
5. Rubber tube + sidearmed test tube
6. Obtain 0.08 g using a weight, place in side-armed test tube 7. 20 ml HCl of 2 moles pr. L in...
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