A pH meter is an electronic instrument used to measure the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading. The probe The pH probe measures pH as the activity of hydrogen ions surrounding a thin-walled glass bulb at its tip. The probe produces a small voltage (about 0
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1 Lab Report Title: Measuring pH Levels Instructions: Enter the Virtual Lab‚ and conduct the experiments provided before going out into the virtual field for additional research. Please type your answers on this form. When your lab report is complete‚ submit it to the Submitted Assignments area of the Virtual Classroom. Part I: Answer the following questions while in the Phase 1 lab environment. Section 1: You will be testing 4 known solutions for pH levels using a standard wide-range
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lObjective This experiment explores how salt and sugar affect the melting rate of ice in water. Research Questions: * Does adding salt to ice and water slow down‚ speed up‚ or not change the rate the ice melts in the water? * Is salt the only substance to have this effect? What about sugar? Knowing how to speed up the melting rate of ice is very important information for anyone who needs to de-ice roads or driveways after a winter storm. While it seems simple‚ adding salt to ice water
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Mark Duanmu‚ Rika Fujita‚ Alex Chung October 8‚ 2011 Biology (Honors) P7 Gill Temperature and Yeast Fermentation Introduction: Saccharomyces cerevisiae‚ commonly known as baker’s yeast‚ is an key ingredient used mainly when baking bread or making alcoholic beverages. The main role of the yeast is to convert the sucrose into carbon dioxide (CO2) and ethanol. For example‚ when baking bread‚ the yeast ferments the sucrose within the dough and so CO2 and ethanol is released‚ causing the bread
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Yeast Fermentation Lab Report SBI4U Chaweewan. Sirakawin Present to Ms.Allinotte November 21. 2014 Introduction: Fermentation is a metabolic pathway that produce ATP molecules under anaerobic conditions (only undergoes glycolysis)‚ NAD+ is used directly in glycolysis to form ATP molecules‚ which is not as efficient as cellular respiration because only 2ATP molecules are formed during the glycolysis. One type of fermentation is alcohol fermentation‚ it produces
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Experiment 20: pH Titration: Phosphoric Acid in Cola Drinks Post-lab Assignment or Report The post-lab report for this experiment is due at the beginning of the following lab period. Student notes for the lab will be available on the lab T-Square site. Learning Objectives Students will be able to... • Use a known mass of solid acid to determine an unknown concentration of a basic solution (this process is called “standardization”). • Execute a titration using good‚ reliable technique.
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Interpretation of Data When looking at my results i can safely say that the change in HCl concentration does affect the rate of reaction with the Calcium carbonate pebbles. The relationship between the change in HCl and reaction rate can be seen in the graph and raw data table presented above. If you compare the lowest concentration with the highest concentration you’d be able to see that there is a very large contrast between their averages. The average gas production of 0.1M HCl was 0.00693 kPa/s
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Cellular Respiration My hypothesis for the germinated pea experiment was that the level of aerobic respiration would increase as the temperature would increase. I also predicted that there would be an upper temperature limit. The experiment proved part of my hypothesis correct and part of it incorrect. I was correct in predicting that the rate would increase as the temperature increase‚ but I was incorrect in hypothesizing that there would be an upper limit. My hypothesis for the larvae experiment
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proportional to the intense of the respiration process that was taking place (Doltar et al.‚ 249). This means that there was high rate of respiration at a temperature of 30°C test tube as compared with the other three test tubes. The optimum temperature for enzyme activity is usually between 35-37°C (Burchfield‚ 303). At this temperature the enzyme activity is maximum and thus the rate of respiration is very high at this temperature. This is the reason why the rate of respiration was very high at the range
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this energy through the processes of photosynthesis and cellular respiration. In photosynthesis‚ organisms harness light energy obtained from the sun to produce organic compounds. On the other hand‚ cellular respiration breaks down the organic compounds produced from photosynthesis to harvest the energy needed to carry out the energy-consuming activities of the cell. As complementary processes‚ photosynthesis and cellular respiration provide each other with the raw materials needed for each reaction
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