Aquatab Temperature Experiment

Maria’s hypothesis for this experiment is that the cold water will freeze faster, she thinks this is correct because the hot water molecules move faster than the cold water molecules, causing the hot water to take longer to freeze.

The dependent variable in the experiment was the temperature and energy absorbed by the water.

• Fourthly, we kept the temperature at a constant 25°C using a water bath. At low temperatures, an increase in temperature causes an exponential increase in enzyme activity. This is because an increase in temperature provides more kinetic energy for the collisions of enzymes and substrates, so

Hypothesis: I believe the rate of reaction will speed up as the temperature increases until it reaches about 37oC, which is the body temperature, where it will begin to slow down and stop reacting. I believe this will occur because enzymes have a temperature range at which they work best in and once the temperature goes out of this range the enzyme will stop working.

As the temperature increases, so will the rate of enzyme reaction. However, as the temperature exceeds the optimum the rate of reaction will decrease.

Special notes: - Interactions in this case is carried out from living person to non-living object.

The aim of the experiment will be to investigate how varying water temperatures influence the time of a chemical reaction, in this case being, a combination of Sodium Thiosulfate and Hydrochloric Acid.

One of our flaws was that the temperature of the water was not exactly the same when we did the different trials. The temperatures were slightly off from our recorded value during the experiments. The change in temperature would affect the time it took for the Alka-Seltzer tablet to dissolve in the water. If there was a direct relationship between water temperature and dissolve time, we would not be able to see it because the temperatures are off and the dissolve times are not associated with the correct temperature. Another flaw is that we did not use the same amount of water throughout the experiment. We used a beaker to measure the water, which did not result in accurate measurements. The difference in amount of water could result in a difference in reaction time. The third flaw in the experiment was that during the reaction of the warm water, the water in the cup overflowed and spilled, bringing some of the Alka-Seltzer tablet with it. There were different amounts of tablet in different areas of the water, which means a different amount of Alka-Seltzer remained inside of the cup in each trial. This difference would mean that data for the warm water would fluctuate and we would not have accurate

As the temperature of the water increases, it causes the H2O particles to move and vibrate more rapidly. As a result, the faster moving particles collide more perpetually with the bicarbonate within the Alka Seltzer tablet causing it to dissolve at a higher rate; in comparison to the room temperature and ice cold beakers of water. Hot water dissolved the tablet faster as it increased the chances of the bicarbonate ion perfectly colliding with the hydrogen particles, as there was more movement.

For our lab, we have six beakers of water. Three of the beakers contain high temperature water that range from 46 ℃ to 55 ℃, while the other three beakers contain room temperature water that range from 22 ℃ to 23 ℃. Then, we take six different colored Alka Seltzer tablets, and place them into the beakers one at a time. We record the length of time it takes for each Alka Seltzer to dissolve

Secondly: The samples were only placed in the water bath for five minutes and as soon as any samples were removed the temperature

Alka-Seltzer contains both baking soda (NaHCO3) and citric acid (H3C6H5O7). The reaction between the bicarbonate ion and citric acid produces water, carbon dioxide, and the citrate ion. Equation 1 shows the balanced equation for the reaction, which can be expressed by, C_6 H_8 O_7 (aq)+ 3NaHCO_3 (aq)→ 3H_2 O(l) + 3CO_2 (g) + Na_3 C_6 H_5 O_7 (aq) (1)

Another variable tested was decreasing the temperature in the reaction of the enzyme catalase. In these tests, the reaction rate showed a slight decrease because the decreasing of temperature makes molecules move slower, which leads to less of an reaction rate. Tests showed that in one instance when a decreasing of temperature was added, the reaction rate was 9 ml/min. This proves that the decrease of temperature slowed down the reaction rate.

As shown on the graph, the temperature of the water without salt is constantly higher than the water with salt, until 2:30. This is when the temperature of the water with salt overtakes, which relates to the previous relationship of the presence of salt and the manner in which temperature rises. Difficulties There were multiple difficulties throughout the planning and conducting of the experiment. One of these difficulties was Improvements

was too fast to measure and so for my scale to reach above that, I