SCIENCE- rate of reaction #2

SCIENCE
EXPERIMENT TWO Investigating the effect of concentration on reaction
AIM: I want to investigate the concentration  effects the reaction rate
EQUIPMENT: 

• a conical flask, 
•  measuring cylinder,
•  stopwatch,
• black cross on paper, water bath,
•  thermometer,
•  0.1 mol-1 sodium thiosulfate,
•  0.1 mol-1 hydrochloric acids (HCl)

METHOD

1. Put the "X" paper on the bench mat, and put the conical flask on top of the paper.
2. measure 10ml of sodium thiosulfate solution and put into the conical flask.
3. measure 40ml of water and put it into the conical flask.swirl the flask to mix the content.
4. measure 5ml of acid. pour the acid into the flask, start the stopwatch, and swirl the flask. time how long it takes for the cross to disappear.
5. wash out the flask thoroughly. Repeat the experiment, using the other volumes of sodium thiosulfate and water in the table on the right, keep the volume of acid the same each time.

RESULTS

10mL Thiosulfate/40mL Water took 1132sec for the X to disappear.
20mL Thiosulfate/30mL Water took 165sec for the X to disappear.
30mL Thiosulfate/20mL Water took 95sec for the X to disappear.
40mL Thiosulfate/10mL Water took 65sec for the X to disappear.
50mL Thiosulfate/0mL Water took  43.88sec for the X to disappear.

ANALYSIS THE RESULTS

CONCLUSION

A chemical reaction is when two reactants collide.

They must collide with enough force, correct orientation and catalysts.

As I increase the concentration they will move faster.

which means that rate of the reaction will increase.