times and get an average. Then calculate the heart beats per minute (just by doubling the average). 8. Clean the cavity slide using a tissue and make sure there is no pond water left. 9. Use a pipette to transfer a known volume of caffeine solution of concentration 0.125% to the cavity slide. 10. Transfer the daphnia to the cavity slide
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Tomas, España Boulevard, 1015 Manila, Philippines Abstract Recrystallization is the primary method of purification used to isolate organic compounds in a supersaturated solution by the difference of solubility at different temperature that results to the separation of the compound from the solution. The purpose of this experiment is to synthesize acetanilide by the acetylation of aniline and to obtain pure acetanilide by purification of the collected crude acetanilide by crystallization
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between the inside and the outside of the cells. You are going to look at the effect of different concentrations of sugar solutions on potato cells. By measuring the mass of the potato cylinders, you will be able to find out if water has entered or left the potato cells. Aim To find out what happens to the mass of potato cells when they are left in increasingly concentrated solutions. Hypothesis My hypothesis was that if the concentration of sugar where the water potential is higher than the water
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familiar with the concept of solubility by determining the concentration of PbI2 and Pb2+ in the slightly acidic solution and to calculate the solubility constant using the equation Ksp=[Pb2+][I-]2 . Safety: Safety glasses must be worn at all times. Gloves are recommended in order to avoid the direct contact between skin and the chemicals. Avoid the spill of chemicals during shaking the solution in the test tube. Must dispose liquids with lead in inorganic waste and filter paper in solid waste. The other
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The PSA persuasive project Maddi and I chose to do was about stranger awareness taught in the Jumpstart community. Although there were a few issues that we experienced, we were prepared for them and overcame them. Starting this project, it took a couple days to figure out a topic that we were willing to put all this time into. I came up with the idea of centering our attention around children. Shortly after, we found the topic about stranger awareness. This was concerning that children should not
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In conclusion, the objective of the experiment was achieved, and the SWIS mixture was successfully separated into its individual substances. There was a .31 grams difference and only a 3% error, meaning the final mass of 10.40 grams varied 3% from the original mass of 10.09 grams, which reveals that not much error was made in finding the mass of each substance. This lab applies to the real world in that it is useful for someone purifying water because he/she would know to filter it to separate the
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osmosis moves across a dialysis membrane. The sub-purpose was to determine if the sucrose solution, that was in dialysis tubing would leak into the distilled water. The hypothesis states that if a sucrose solution, in dialysis tubing, is placed into a beaker filled with distilled water the net movement of sucrose will be into or out of the dialysis bag. The null hypothesis states that if the sucrose solution in a dialysis bags mass may change after taking it out of the water each time to be weighted
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1. 2 observations and 2 inferences a. There were 3 different lengths of strings used 1 washer was used The washer is made of copper. They used hemp string in the scenario b. 1 tablet was used. 1 cup of water was used The tablet is alkaline base The water has some levels of acid in it. c. Point A has a population size of 300. Gen 15 has a population size above 400. Point B is the Baby Boom generation. The population needs to be over 500 to be consider a substantial size. d. Enzyme A at 20 Celsius
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the more light is absorbed by the solution. Next, we studied color and wavelength and found that solutions of different colors transmit and absorb at different wavelengths. Lastly, by conducting all of these experiments, our group has become efficient and consistent while using the Spec20. We used the guide on how to use the Spec20 found on Canvas. By mastering these goals, we are ready to further study the phosphate concentration
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Conclusion: From my results and the above graph I can see that at 0.4 molar there is no loss or gain in the weight of the potato- a 0% increase in weight. This shows that the concentration of the solution is the same as the concentration in the potato. From this I can conclude that the concentration inside the potato is 0.4 molar. These findings supportmy prediction however I was not sure of the exact concentration and now I have a better estimate, but the general trend is the same. The general trend
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