At 20 seconds‚ pH = 7.4 2. At 40 seconds‚ pH = 7.4 3. At 60 seconds‚ pH = 7.4 4. Did the pH level of the blood change at all during normal breathing? If so‚ how? No‚ it stayed at 7.4 5. Was the pH level always within the “normal” range for the human body? Yes 6. Did the PCO2 level change during the course of normal breathing? If so‚ how? No‚ it stayed at 40mm Hg Activity 2a: Hyperventilation – Run 1 1. At 20 seconds‚ pH = 7.43 2. At 40 seconds‚ pH = 7.52 3.
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first collecting rainwater from selected rural and urban areas. After the collection was done‚ the rainwater samples were tested using a pH meter. The results of the pH test of rainwater in urban areas: in Novaliches‚ Quezon City‚ in Philcoa‚ Quezon City‚ in Katipunan‚ Quezon City‚ in Paco‚ Manila‚ and in Malate‚ Manila are between 6.08 to 6.10 The result of the pH test of rainwater in rural areas: in Iriga City‚ Bicol‚ in Buhi‚ Bicol‚ in Naga City‚ Bicol‚ in Calamba‚ Laguna‚ and in Biñan‚ Laguna
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aqueous solution) and a salt; this reaction is called neutralization. A buffer solution is a solution that contains both an acid and a salt containing the conjugate base anion in sufficient concentrations so as to maintain a relatively constant pH when either acid or base is added. In this experiment you will prepare a buffer solution and observe its behavior when mixed both with an acid and a base. You will also compare the behavior with that of solutions containing only the acid. Theory
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concentration increases? A) The relationship between the substrate concentration and the initial reaction of an enzyme-catalyzed reaction is very productive‚ but is dramatically affected by the pH level of the given solution. The most productive pH level is pH7 B) The relationship is somewhat linear both according to the pH level‚ and substrate concentration up to the point of saturation‚ which in this case was reached between 2g‚ and 4g of substrate C) The reaction grows in productivity with an increase
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table of results. The graph shows that the highest rate of reaction is at pH 7. This therefore supports my theory that at pH 7 the rate of reaction will be highest. This relate to other resources‚ such as books and the internet‚ which show that the optimum pH value for catalase is pH7‚ therefore there is no difference between the optimum pH and the pH used in the experiment‚ hence the enzyme structure is not affected by the pH and is most active. However the graph inadequately supports the second
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volume changes Chapter 16: Acid-Base Euilibrium Brønsted-Lowry acid Brønsted-Lowry base amphoteric water equilibrium constant pH pOH pH scale weak acid Ka and pKa weak base Kb and pKb oxyacids carboxylic acids polyprotic acids amines conjugate acid conjugate base pH of acidic salt solutions pH of basic salt solutions relate Ka and Kb acid strength (binary acids) acid strength (oxyacids) Lewis acid Lewis base Chapter 17: Additional Aspects
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phthalate‚ solution and the second one is determining the molarity and percentage by mass of the acetic acid in vinegar. 6 g of NaOH solid is used to dilute with distilled water to prepare a 250 mL of 0.6M sodium hydroxide. pH electrode will be immersed into the solution and a grph of pH versus NaOH is obtained. The next part is to determine the molarity of acetic acid and mass percent in vinegar where the vinegar is diluted as the same way in previous part. The titration is repeated twice for both parts
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to prevent the body tissues from being damaged by the peroxide. pH is used to measure the acidity or basicity of a solution and is very important when chemical reactions are concerned. A value of 7 is neutral while a pH of less than 7 is acidic and a greater pH than 7 is basic. This scale is logarithmic‚ which means that for every increase or decrease is 10 times more or less acidic/basic than before. In the human body‚ optimal pH levels range from 7.35-7.45‚ any changes out of this range can be
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suitable reference electrode and a sensitive potentiometer (a pH meter) may be advantageous. THEORY Any acid-base titration may be conducted potentiometrically. Two electrodes‚ after calibration [to relate potential in millivolts (mV) to a pH value] are immersed in a solution of the analyte. One is an indicator electrode‚ selective for H3O+ and the other a stable reference electrode. The potential difference‚ which after calibration is pH‚ is measured after the successive addition of known increments
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Kenishia Pascal 10x3. Investigating How Different Concentration Effects The Rate Of Reaction. Strategy A Possible Factors * Source of catalase * Concentration * Surface Area of enzyme * Concentration of enzyme * pH * Temperature Chosen Factor We chose to investigate the concentration of enzyme as we had previously investigated the optimum temperature for catalase in the preliminary investigation. Concentration of enzyme is also fairly easy to investigate
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