It was hypothesised that the isolated chloroplasts from silverbeet leaves exposed to while light (Tube 3); the tube wrapped in red cellophane (Tube 6) would have a faster rate of photosynthesis, than the chloroplast kept in the dark (Tube 2), the boiled chloroplast suspension (Tube 4), the addition of DCMU (Tube 5) and the tube wrapped in green cellophane (Tube 7). Methods Table 1. Experimental design for the electron transport experiment. | | | | | | TREATMENT | | | | | BLANK 1 | DARK 2 | LIGHT 3 | BOILED 4 | DCMU 5 | RED 6 | GREEN 7 | A | chloroplast suspension (ml) | 1.5 | 1.5 | 1.5 | - | 1.5 | 1.5 | 1.5 | B | buffered sucrose (ml) | 5.5 | 5.3 | 5.3 | 5.3 | 5.2
At the second titration, the experiment was exactly the same as the first titration but the H2SO4 solution was used to instead of the HCl solution. The same step as the first experiment was repeated. In the third experiment, the buret had used Ba (OH) 2 thoroughly rinsed three times. 10mL of HCl
Discs made of spinach leaves were deoxygenated and placed in beakers with different wavelengths of light in order to measure which wavelength produced the most oxygen the fastest. This experiment was controlled by placing the beakers under various colors, including green although it is known that the color green is reflected by chlorophyll. The hypothesis for this experiment was that the white light would be the most effective and this was most definitely proven true by the data. It was found that white light was the most effective, followed by blue (450 nm) and then red, green and dark (700
Hypothesis: I expected that the high-density Polethene would sustain more weight than the low density Polethene before braking for many reasons. Firstly, the high-density Polythene has many more monomers in the same area of plastic surface. The denser plastic the longer it will stretch before breaking. The Low-density Polethene has fewer monomers than the high density plastic and therefore has fewer bonds that can move more easily and can be stretched more freely. Another reason I believe that the low-density Polythene will break first is because the monomers are in straight lines and the high-density polymers overlap giving the material more strength.
The pH of a neutral is 7. Bases have a high number of hydroxide ions, but a low number of hydrogen ions. The pH of a base range from 7.1 to 14 on the pH scale. The more hydrogen ions a substance have the stronger the acid will be. The more hydroxide ions a substance has the stronger the base will be.
According to Exhibit 7a, Samsung’s prices per chip are on average higher by $0.72 than those of its competitors, or by 14.5%. Remember that price is not the same as WTP, it’s usually considerably lower especially in competitive industries. But Samsung’s higher prices do suggest that customers have a higher WTP for Samsung’s chips. What explains the price premium? P.2 mentions that OEMS would an “upwards of 1%” premium for superior reliability, which Samsung surely offers, but that’s only 1% (5-6 cents), not 14.5%.
Abstract: The ability to isolate caffeine from tea leaves was questioned and was found to be successful in this experiment. This was achieved by extracting caffeine, separating other natural substances and sublimating the existing caffeine. The weight of the caffeine isolated from the tea leaves was .0186g; which is a 33.8% recovery of the original material of caffeinated tea leaves. Introduction: This experiment’s purpose is to extract the caffeine that consists in a small portion of tea leaves. The theory of extraction is a technique used to separate organic compounds from a mixture or a solution of compounds.
In an enzyme-catalyst reaction, the substrate binds to the active site and forms an enzyme-substrate complete with the enzyme. (Heller, H. Craig., Gordon H. Orians, William K. Purves, and David Sadava).The enzyme then breaks the bonds in the structure of the substrate. The products of the reaction then leave the enzyme which remains unchanged after the reaction. The enzyme of this experiment was the yeast Peroxidase and the substrate of the experiment was hydrogen peroxide which was diluted by water.
Method: In this investigation same volume of 3 different types of orange juice are used, to find out which one has the most Vitamin C. This investigation involves using the organic indicator called Dichlorophenolindophenol which abbreviates to DCPIP. The indicator is a dark blue colour which turns colourless when a known amount of it is used neutralize ascorbic acid which is Vitamin C. The amount of juices used to turn the DCPIP colourless will be recorded and the vitamin C content will be determined by measuring the amount of a known vitamin C concentration
Task 2 Extended Experimental Investigation of Vitamin C Contents Abstract 3 Introduction 3 Aim 4 Hypothesis 4 Materials 4 Titration Planning and Results 5 Procedure 5 Volume of Potassium Iodate added to Titrate Juices. 6 Vitamin C Concentration 6 Discussion 7 Conclusion 7 Bibliography 8 Abstract The experiment was conducted to find whether Vitamin C was preserved and protected more in a citrus such as squeezed Orange juice rather than squeezed Kiwi Fruit Juice, An Apple Juice in a Tetra Pack and squeezed Apple Juice. The experiment was done using the Redox Titration method. This resulted in the Tetra Pack having lost the least amount of Vitamin C with a difference of 12.47mg/100ml degrading. The Orange Juice which was predicted to have the lowest loss of Vitamin C had a difference of 15.64mg/100ml which was less than the other squeezed juices.