The eudiometer will show the displacement of the water in volume of CO2. Hypothesis: I predict that the greater the concentration of hydrochloric acid, the greater the rate of reaction and so more carbon dioxide will be produced in the same time period than at lower concentrations. I predict this because there will be more collisions between the calcium carbonate and hydrochloric acid. Variable Factors Reasons Control 1.Time duration of experiment 2. Mass of Marble Chips 3.Surface Area of Marble Chips 4..
When we increase the temperature of the Hydrochloric acid (HCl) the reaction will be quicker, more gas will be formed in a short amount of time. Because increasing the temperature, the particles move faster the ions have more kinetic energy, causing more collisions. Which will increase the reaction. As the temperature decrease the reaction rate will decrease because the particles have less thermal energy, will travel slower, less collision with other particles as a result of this the reaction rate will be lower. Similarly when the Calcium Carbonate (CaCO3) is broken down into powder the rate of reaction will increase.
Record the temperature of the water in the Calorimeter and the temperature of the boiling water. 7. Quickly pour the metal into the Calorimeter. 8. Stir the Calorimeter slowly with the thermometer.
Results: | | Tension (N) | a (experimental) | a (theoretical) | 0.05 | 0.05 | 0.49 | 0 | 0 | 0.05 | 0.1 | 0.65 | 3.24 | 3.27 | 0.1 | 0.15 | 1.18 | 2.07 | 1.96 | 0.1 | 0.2 | 1.31 | 3.43 | 3.27 | Analysis/Discussion: The results show that the greater the ratio of mass, the acceleration will be also greater. The hypothesis was found to be true. When both masses are the same, the acceleration (both theoretical and experimental) are indeed zero. As the ratio of the masses increased, so did the acceleration. The tension got bigger as the
HYPOTHESIS: I think, that the greater the volume, the lower the pressure will be and vice versa. The smaller the volume, the greater the pressure will be. That is, because when the area will be decreased, such as in the injection tube if we press it, the molecules will collide more quickly with the boundaries or walls of the area it is in, therefore the pressure is increased, as already mentioned. VARIABLES: Dependent variable: Pressure Independent variable: Volume Constant variable: Temperature. MATERIALS: Autor computer program, Interface Coachlab II/II+, injection, plastic tube for connection of the measurment station and the injection.
I also predict that doubling the concentration of acid will require double the amount of alkali to reach an end point. This would be due to there being more hydrogen ions present in a more concentrated acid, and therefore more OH- ions needed to neutralise these. When concentration doubles, this means there is twice as many H+ ions; therefore twice as much alkali will be needed to balance them out. Apparatus list:
Paragraph 1 The research paper talks about how the temperature of formation and crystallinity of iron phosphate, FePO4, is critical in determining its electrochemical behaviour. FePO4 is known to crystalline in several different structures. At 600 degrees, FePO4 irreversibly changes into an electrochemically inactive quartz-like structure, which shows that the olivine form is metastable. FePO4 at a high temperature is limited to measurements of call parameters. In the case of α-phase FePO4, cell parameters tend to increase exponentially as temperature increase.
Because the rate of reaction refers to how quickly the reactants are used up or how quickly the products are formed, one method is to measure the volume of gas given off, the more gas given off per time interval results faster reactions.Question: Will the changes in substrate concentration affect the rate of anaerobic reaction? Why or why not? What are the independent variable and dependent variable in this lab activity? What are some other controlled variables? Hypothesis: If substrate concentrations are changed, then as the concentration increase, the rate of anaerobic reaction will also increase, because the increase of the reactant concentration means there are more reactant particles, and there is a greater chance for these particles to collide and let reaction happen.
Discussion: So, the density of water is definitely larger than the density of oil. The slope of density graph is calculated by the volume (Y value) / the mass (X value). The greater the value of slope, the steeper the slope it will be, and the denser the object it is. If I mix or combine the oil and water in a clear beaker, the water and oil will be separated into two layers. The oil will be in the first layer, in short, oil will float on the water.
1. Explain why atmospheric pressure always decreases with increasing altitude. Because the higher you get the more room there is between molecules, which means less weight from above. Basically the air gets thinner the higher you get, so there is less pressure. 2.