Ph Lab Report Bryon Kim 123013 B(2) Biology Background information/Research PH paper (litmus paper) determines how acidic or how basic a substance is. The paper changes color accordingly to color code on the pH scale. The pH scale starts from 0 to 14. The lower the number the more acidic it is. Zero is the most acidic‚ and 14 is the most basic while 7 is the neutral number for example water. Examples of an acid is lemon juice or multi purpose cleaner. Examples of a basic substance is shampoo or liquid soap
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Rodriguez October 20‚ 2010 IB Biology SLII The effect of three different pH levels (4‚ 7‚ 10) on the rate of germination of spanish beans Research Question: What is the effect of three different pH levels (4‚ 7‚ 10) on the rate of germination of spanish beans? Independent Variable: The different pH levels in the water would be the independent variable in this lab. Three different pH levels were tested‚ 4‚ 7 and 10‚ both 4 and 10 were chosen because they are 3 pH levels away from 7 which would
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Starsky Intro to Biology September 26‚ 2011 Lab Partners: Kristen‚ Tania and Betty Introduction When using different methods to measure pH levels there are some tools that can be useful. Some more than others but by putting into action the different methods it may determine which tools will work best and give the best results when testing the pH within a solution. The pH‚ which stands for
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Biology Lab Report 2 Investigating the phenomenon of Osmosis in plant tissues: Potato in different concentrations of NaCl Tutor: Maria Tsaousidou By Marina Gkritzioudi Biology Lab Report 2 Investigating the phenomenon of Osmosis in plant tissues: Potato in different concentrations of NaCl Tutor: Maria Tsaousidou By Marina Gkritzioudi Investigating the phenomenon of Osmosis in plant tissues: Potato in different concentrations of NaCl Introduction: Osmosis is the movement of
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Biology IB Standard Level 2012-2014 Index Topic 1 Topic 2 Topic 3 Topic 4 Topic 5 Topic 6 Topic 7 Topic 8 Topic 9 Topic 10 Topic 11 Statistical analysis Cells The chemistry of life Genetics Ecology and evolution Human health and physiology Nucleic acids and proteins Cell respiration and photosynthesis Plant science Genetics Human health and physiology Topic
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sets of data in your lab report. Part II: Titration with a pH Meter 1. Fill the 50-milliliter buret with a 0.25 molar NaOH solution. 2. Record volume. 3. Measure out between 20 milliliters and 40 milliliters of the unknown HCl solution. This amount must be different than the amount used in part I. 4. Record volume. 5. The amount of unknown HCl is then added to the 100-milliliter Erlenmeyer flask. 6. Insert the pH meter into the Erlenmeyer flask and record the initial pH of the acid. Remember
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can reach a new pH level by interacting with soil. If water has a pH that is too high or too low‚ it can be life threatening to aquatic species and can corrode metal structures. After finding this out‚ I decided to test if water could reach an extreme pH just by interacting with soil around it. The question for this experiment therefore became the following. Will interaction with soil change the pH of water? I hypothesized that if water interacts with soil for three days‚ then the pH of the water will
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Buffers‚ and pH‚ and Diffusion oh my The pH of a solution is the measure of the concentration of charged Hydrogen ions in that given solution. A solution with a pH lower than seven is considered to be acidic. A solution with a higher pH is a base. It is very important for organisms to maintain a stable pH. Biological molecules such as proteins function only at a certain pH level and any changes in pH can result in them not functioning properly. To maintain these constant pH levels‚ buffer solutions
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Is the neural pathway significantly longer for a visual stimulus or a sound stimulus (or a pressure stimulus) Data collection and processing Table 1a: Data collected by John Rha and Arthur Hamilton by dropping ruler for calculation of length of the neural pathways (Visual‚ Auditory and Sensual) Trial# | Visual | Auditory(Sound) | Sensual(Pressure) | | (cm±0.1cm) | (cm±0.1cm) | (cm±0.1cm) | | John | Arthur | John | Arthur | John | Arthur | 1 | 43.9 | 24.1 | 33.1 | 34.6 | 50.1 | 50
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Variables | Dependent Variables | Controlled Variables | Amount of Coca-Cola consumed for each trial: * 500mL * 400mL * 300mL * 200mL * 100mL | Blood Pressure after consumption of caffeine. | Blood Pressure pre-consumption of caffeine. | Lab Setup: Blood Pressure Cuff and Bulb Coca-Cola Measuring Cup Vemier Labquest Procedure: In order to test my hypothesis‚ I decided to use a common caffeinated beverage‚ Coca-Cola. The amount of caffeine
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