This means the acid concentration and the reaction rate should be directly proportional in my experiments.
In all the reactions it is only the high-energy collisions that produce a reaction.
If the collusion is not hard enough the particles just bounces off each other.
DIAGRAM
FLASK
MABLE CHIPS+ CLAMP
HYDROCLORIC ACID
FAIR TEST
We will vary (change) the acid concentration.
All other variables must be kept constant (same) in all our equipment
The size of the marble chips
The volume of acid
Size and shape of container
Size of marble chips medium
Reactions also speed up if they are warmed. The temperature would change the speed of the particles in warm acid the particles move faster and if they move faster it is more likely they bash into each other and there will go faster and faster as the temperature increases. It also increases the energy of the collisions because it makes all the particles move faster. So in this investigation I will try to keep the temperature constant.
CALCIUM CARBORATE CARBON DIOXIDE+ CALCUIM
+ HYDROCHLORIC ACID +CHLORID+WATER
CaCo + 2HCl Co + H o+CaCl
METHOD
- The first thing I did was read the instructions & wrote them down.
- Than I got the equipment and set it up.
- I got the medium marble as they were best suited for the experiment. I did some preliminary work and the powder reacted too to fast/big chips too slowly.
- I weighed 5.0 grams g medium chips then I put it in a piece of paper.
- I put 25cm of acid in the flask (measure using a clean measuring cylinder)
- Than I added the marble chips and put the stopper on the flask.
- I recorded the results (volume of gas in the syringe) for every 5 second until 60 seconds for 2, 1, 0.5, 0.25, 0.125 molar of acid.
- I repeated the experiment 3 times for each concentration I tried 5 different concentrations.
VOLUME OF GAS (CM )
0.125 MOLAR ACID
0.25 MOLAR ACID
0.5 MOLAR ACIDS
1 MOLAR ACID
2 MOLAR ACID
AVERAGE RESULTS
ACID CONCENTRATION (MOLAR)
CONCLUSION
I think that I did the experiment fair as possible and my prediction came out right. I predict that the 2 molar acid would have been stronger that 1 molar 0.5 molar 0.25 molar and 0.125 molar.
I also believe that the collision theory came out right as the high the concentration of acid the faster the reaction happened the solution when from a colourless liquid to a opaque.
EVALUATION
I think that I did the experiment very fairly as I measured every think carefully and took three reading. But the clamp did not hold the syringe parallel to the table.
I could have done it fairer by taking more reading or getting steady clamp or using two clamps.
BY
VEER RAGHVANI
