... of reaction between Sodium thiosulphate and Hydrochloric acid. I have chosen to investigate temperature because it can be controlled quite easily using a water bath and I also think it will also be the most practical. Hypothesis Based on my knowledge of the collision theory I believe that as ... 12. I emptied out the mixture of the solution and rinsed the conical flask. 13. I then repeated steps 5-9 but instead settled the temperature of the water bath to 30 °C and waited so the two solutions were at 30 °C too. 14. Then I repeated steps 5-12 again but instead with 70 °C. Preliminary E...

• Word Count: 3666
• Approx Pages: 15
• Has Bibliography
• Grade Level: High School

... which breaks down the hydrogen peroxide A Measuring cylinder - to collect the oxygen which forms once the hydrogen peroxide has decomposed. Water bath – this is a thermostatically controlled bath which enables the experiment to be carried out at precise temperatures. A bung with plastic tubing – this is used to ... connect the first boiling tube to the collecting bath. A stopwatch – this is to enable the experiment to be accurately timed The collision theory is based on the principle that for ... that is produced as the hydrogen peroxide decomposes. A second boiling tube will be f...

• Word Count: 1786
• Approx Pages: 7
• Grade Level: High School

... which breaks down the hydrogen peroxide A Measuring cylinder - to collect the oxygen which forms once the hydrogen peroxide has decomposed. Water bath – this is a thermostatically controlled bath which enables the experiment to be carried out at precise temperatures. A bung with plastic tubing – this is used to ... connect the first boiling tube to the collecting bath. A stopwatch – this is to enable the experiment to be accurately timed The collision theory is based on the principle that for ... that is produced as the hydrogen peroxide decomposes. A second boiling tube will be f...

• Word Count: 1867
• Approx Pages: 7
• Grade Level: High School

... will drop as the plant's enzymes are denatured. Temperature is the only factor that I will change while carrying out this lab with the help of a water bath. Apparatus: Elodea Plant - An Elodea plant is used as it is an aquatic plant. It is a plant that releases oxygen bubbles which are easy to ... - This is used to maintain constant light intensity. The bench lamp acts as the sunlight. This ensures that light is not a limiting factor. Water Bath - A water bath is used to change temperature of the water. This is a way to indicate different weather temperatures. Sodium Hydrogencarbonate - T...

• Word Count: 1748
• Approx Pages: 7
• Grade Level: High School

... that concentration, temperature, and pH have in these reactions. II. Materials 1% Sucrose (1g/99ml of distilled water) Buffers (pH 1.0, 4.4, 9.2, 13.0) Sucrase (1 packet yeast to 500ml distilled water) Ice Bath and Warm Water Bath Test Tube Rack Test Tubes Pipette Beaker Test Tube Clamps Benedict's Solution Thermometer Distilled Water Marker Hot Plate III. Procedure A. The first experiment tested the effects of concentration on ... of sucrose and pH 4.4 buffer but each were kept in designated temperatures. Test tube 1 was kept in at 0 degrees Celsius (an ice bath), tube 2 was kept at 30...

• Word Count: 705
• Approx Pages: 3
• Grade Level: High School

... cuvette. The spectrometer was calibrated with the blank cuvette. Then I prepared a mixture of 35 ml of starch and 35 ml of distilled water in a flask. I placed this solution into a water bath to achieve 70°C. Then 11 cuvettes were each filled with 0.1 ml of I2KI . Next 5 ml of the 70 ml solution was measured into one of the 11 cuvettes and ... cuvette. The spectrometer was calibrated with the blank cuvette. Then I prepared a mixture of 35 ml of starch and 35 ml of distilled water in a flask. I placed this solution into a water bath to achieve 70°C. Then 11 cuvettes were each filled wi...

• Word Count: 1671
• Approx Pages: 7
• Has Bibliography
• Grade Level: High School

... tube will be placed in different temperature water baths. The first tube will be placed in an ice bath that should maintain a temperature of 30F. Another tube should be kept at a constant 70F water bath and the other tube should be placed in water bath at a temperature of 100F. There will be no substrate in these control tubes. After 20 minutes, a spectrophotometer can ... ...

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... Measuring cylinder • Boiling tube (x2) • Rubber tube • Beaker • Bung • Hydrogen peroxide of 20volIce (approx. 20 cubes) • Ruler • Burette • Cork borer • A water bath • Beaker • Ruler Diagram: Set apparatus as shown in the diagram. Cut out a piece of potato using the 10mm cork borer, then cut to a length of 4cm long and ... my prediction. I think the reason for this was because I: used a wide range of results, found the average results which cancelled out anomalies and used accurate measuring facilities, such as; water bath which made us to be able to adjust the tem...

• Word Count: 2395
• Approx Pages: 10
• Grade Level: High School

... any anomalies. Apparatus The apparatus I would use for this experiment is: - Test tube - Test Tube rack. - Hydrogen peroxide (H2O2 in different concentrations). - Stop watch. - Potato. - Beaker - Cork borer - Syringe. - Water bath Method To do this experiment I would use 15 one-millimetre thick potato disks by cutting them, once taking the potato out by using a cork borer. I would use these 15 disks ... in all the experiments because the catalase will not run out but the hydrogen peroxide will. I will use a water bath to keep the temperature the same as usually enzymes work better with ...

• Word Count: 871
• Approx Pages: 3
• Grade Level: High School

... test tube was recorded. The same steps were then repeated with the test tube at 35°C, and 65°C respectively. The 35°C, and 65°C test tubes were placed into a 50° hot bath, until optimal temperature was reached. Times were recorded for each test tube using a timer. After testing for the effects of temperature of the substrate on enzymes, the effect of substrate ... ...

• Word Count: 2220
• Approx Pages: 9
• Has Bibliography

... of a large beaker was filled with water, placed on to a hot plate and then set to high. Then a test tube of Catalase and water was placed in the hot water bath after the desired temperature was reached of 90 degrees Celsius. This step was repeated for two more stations with hot plates except the hot plates were set to 4 and 2 after ... ...

• Word Count: 2123
• Approx Pages: 8
• Has Bibliography
• Grade Level: High School

... inefficient heating techniques on the experimenters behalf. Also though, mixing the tubes every minute is inefficient in the sense that you have to remove the test tube from the water bath (heating technique) causing a break in what is supposed to an uninterrupted heating process. In the future another method of keeping the contents well mixed could be used. Each enzyme and ... ...

• Word Count: 1327
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

... the higher temperature and so the collision produce more energy and they then have enough activation energy (explained above) to react. I will do this by keeping the solutions in a water bath before I use them because this will cause minimum temperature change. I will make sure I do them all on the same day. I will also keep the volume of the solutions to be ... ...

• Word Count: 1509
• Approx Pages: 6
• Grade Level: High School

... a different pH level (66 data entries). The effects of temperature: Five different water baths were prepared at the following temperatures: 15, 30, 45, 55, 60, and 70 deg C. Each water bath had a separate reaction flask containing 35 ml of starch solution and 35 ml of distilled water. When reaction flasks reached the appropriate temperature the enzyme was added. The basic procedure ... ...

• Word Count: 1676
• Approx Pages: 7
• Grade Level: High School

... compounds and are thus well suited as solvents for this reaction. Procedure: Rapidly weigh 12 g of KOH into 100-ml rb flask, add 30 ml dimethoxyethane, immediately cool in ice bath. Swirl for two minutes, the purge with nitrogen for two minutes. Quickly stopper flask and shake to dislodge KOH cake (much will remain undissolved). Grind 3.5 g iron(II) chloride tetrahydrate to ... ...

• Word Count: 793
• Approx Pages: 3
• Grade Level: High School