The variation of the concentration of sodium bicarbonate will have an effect on the rate of photosynthesis of spinach (Spinacia oleracea). As the amount of sodium bicarbonate increased the rate of photosynthesis also increased, this is because bicarbonate provides carbon dioxide (CO2) for the photosynthetic reaction which was also found in the experiment: An Assay Utilizing Leaf Disks (Guy, 1985). When completing this experiment there was one mane issue with our experiment that might have affected the results. The main issue that was faced was when the leaf disks were being exposed to the higher percentages of sodium bicarbonate while they were being vacuumed in the syringe. We found that the sodium bicarbonate was reacting with the leaf disks before they were placed
Purpose: The purpose of this experiment is to see how long it takes for the 10 spinach leaf discs to undergo photosynthesis and thereby rise in the two solutions. Hypothesis: All of the leaf discs in the sodium bicarbonate solution should be floating before the discs in plain water because the bicarbonate is a carbon source that will allow photosynthesis to continue. Background: Light is absorbed by leaf pigments (chlorophyll) which makes electrons within a photosystem moved to a higher energy level. The leaves then make ATP, which reduces NADP to NADPH, and add CO2 into organic molecules. When the leaves go through the process of a light-dependent reaction by being placed in water, oxygen is created through photosynthesis and is released
AIM Design an experiment to study a thermodynamic property of a chemical substance, a chemical reaction, a physical change or chemical phenomenon. BACKGROUND INFORMATION Standard enthalpy change of solution, ∆Hsolnø, is the enthalpy change when one mole of a substance dissolves in water to form a solution of infinite dilution under standard conditions.1 The standard enthalpy change can either be exothermic or endothermic. An exothermic reaction is a reaction where energy is released as a form of heat or light. This is usually denoted by a negative enthalpy change. The heat that is released in the reaction causes the surrounding temperatures to increase.
Objective: I will be combining calcium carbonate with hydrochloric acid as a case study to measure the rate of chemical reaction. This gives us the equation CaCO3 + 2HCl H2O + CaCl2 + CO2 Background Information: Several factors are already known which increase (or decrease) the rate of reaction. An increase in concentration of the acid allows for a greater number of hydrochloric acid molecules colliding into those of calcium carbonate. Although not every single particle would result in a successful reaction, increasing the number of particles will increase the total number of reactions. Another method is to increase the surface area of the solute.
The scientific name is Elodea Canadensis (Ashley, 2000). This experiment will look at the effect of light intensity on the rate of photosynthesis in Elodea plants. Aim The aim of this experiment is to examine the effect of light intensity on the rate of photosynthesis. Hypothesis The rate of photosynthesis is directly proportional to light intensity but inversely proportional to
The rate actually depends on the concentration of hydrogen peroxide raised to a power, called the "reaction order." Equation 5: Rate = k(H2O2)x • k = Rate constant, in 1/seconds (s) • (H2O2) = Concentration of hydrogen peroxide, in moles/liter • x = Order of the reaction for hydrogen peroxide, unit less The good news from Equation 5 is that the rate depends on the concentration of hydrogen peroxide, and you will know what the concentration of hydrogen peroxide is when the reaction starts. You will use the number of hydrogen peroxide drops as a measure of its concentration. *insert aim* Hence I’ve arrived at the following question: How does varying the concentration of hydrogen peroxide affect the rate of reaction? Research Question: How does varying the concentration of hydrogen peroxide affect the rate of reaction?
Title Which frequencies and type of light aided and affected the efficiency of photosynthesis or carbon dioxide consumption in a spinach leaf? Purpose The purpose of the experiment/lab was to observe the effectiveness of different lights during the process of photosynthesis. Background Photosynthesis is a biological process. It occurs in plants, algae and specified bacteria (prokaryotes). Photosynthesis is the process where plants, algae, and bacteria convert light energy into chemical energy.
This energy serves to evaporate the working fluid out of the absorption medium at a high pressure. The absorption medium’s pressure is then reduced via an expansion device as it flows to the absorber. Within the absorber the working fluid is absorbed (P0/T1) back into the medium. This is an exothermic process, meaning usable heat is released at an intermediate temperature. Lastly, the pressure of the mix is increased with a pump and flow back to the generator (where thermal energy is provided in the first place).
In these potential conditions, the photogenerated holes are able to either directly oxidize the absorbed pollutants or oxidize the hydroxyl groups located at the TiO2 surface to form •OH radicals, whose redox potential is only slightly decreased (Fujishima et al., 2000). In addition, it is possible to increase the number of •OH radicals by adding into the photoreactor H2O2 or O3 which can be photolyzed by UV irradiation. During the heterogeneous photocatalytic process, the TiO2 catalyst can be utilized either under dispersed form (powder, aqueous suspension) or in thin film form (fixed TiO2 catalytic layer on solid support). However, a drawback of the dispersed form is the progressive formation of dark catalytic sludge, which diminishes the efficiency of UV irradiation and reduces the photoreactor performances. In contrast, for TiO2 films, there is no need to separate the catalytic particles at the end of the process, but the catalytic layer must be very stable and
They harness their energy form the sun to carry out photosynthesis (Miller and Levine) However, other things are needed to do photosynthesis as well. Carbon dioxide and water are the key components to process photosynthesis. Chloroplast makes photosynthesis happen. They are organelle, or a specialized structure that performs important task in the plant cell. Cell in the plants co-operate to help