Hypothesis: If enzyme activity is affected by the pH of a solution‚ then the enzymes will experience the greatest activity at a pH of 6. Variables: Independent Variables Dependent Variable Controls Four different pH values (10‚ 7‚ 6‚ and 3) Change in color of the solution The amount of potato extract‚ pH solution‚ and catechol used (1 cm +/- .1cm) Size of the test tubes Amount of time allowed for the catechol to sit with the potato extract and pH solution (20 minutes with 5 minute intervals
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Vu Yr. 12 Chemistry Viet Vu Yr. 12 Chemistry Table of Contents Aim 2 Hypothesis 2 Background and Theory Review 2 Swimming Pools 2 Equilibrium (dynamic‚ static‚ Le Chatelier’s Principle) 2 pH 4 Chlorine 5 Equilibrium Constant 6 Wavelengths and UV Rays 6 Rationale 7 Materials and Method 8 Results 14 Calculations 18 Discussion 24
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your name‚ UF ID number‚ and Form Code. Check your bubbling carefully – bubbling errors will not be negotiated. Turn in your scantron and retain your exam (with your answers circled). Potentially useful info : Kw = 1 x 10‒14 at 25°C pH = −log [H3O+] pH = pKa + log ([base] / [acid]) R = 0.0821 atm•lit/mol•K or 8.314 J/mol•K Kp = Kc(RT)∆n(gas) ΔG = ΔH – TΔS ΔG° = ΔH° – TΔS° ΔG° = −RTlnK ΔG = ΔG° + RTlnQ ΔG°rxn = ∑mΔG°f(prod) − ∑mΔG°f(react) (likewise for ΔH°rxn and ΔS°rxn) ln(K1/K2)
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your response in short-answer format (2–3 detailed sentences each). Use this Phase’s activities and resources to assist you in answering. 7. What is pH? a. pH is a measurement of hydrogen ion concentration. It measures rather the solution is acid‚ base‚ or neutral. 8. What is a base? a. Accepts hydrogen ions from another substance that have a pH>7. It taste bitter and feel slippery. 9. What is an acid? a. Component with a positive or negative charge that break apart in water to form
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values: pH – 7.35 – 7.45 PaO2 – 80 to 100 mm Hg O2 Saturation – 95% - 100% PaCO2 – 35 – 45 mm Hg HCO3 – 22 – 26 mEq / L 1 ABG Analysis pH – body must maintain a delicate balance of acids and bases to maintain homeostasis pH indicates the concentration of hydrogen ions in the blood Respiratory and metabolic processes work to keep hydrogen ion (H+) levels stable Normal pH of arterial blood is 7.35 – 7.45 (slightly alkaline or basic) pH of less than 7.35 indicates acidosis (high H+) pH of more
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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plants faster than vinegar or both vinegar and ammonia together. Introduction BACKGROUND INFO: RADISH PLANT Radish plants usually grow in about three days if optimal conditions are kept. Optimal conditions for radish plants includes a soil whose pH is from 6 to 7. The soil has to be fine and not crumbly in order for the roots to grow. Also‚ they need at least 6 hours of sunlight and their soil should always be kept moist (GardenAdvice‚ 2007). In this experiment‚ 5% concentrated vinegar and 5%
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CHEMISTRY 101.1 Intermediate Chemistry Laboratory I Institute of Chemistry University of the Philippines‚ Diliman I. Synthesis of Salicylic Acid Purpose: Part I of the experiment illustrates the base hydrolysis of an ester‚ methyl salicylate‚ to form salicylic acid through nucleophilic acyl substitution. Procedure: Dissolve 12 g NaOH in 70 mL water in a 150 mL round bottom flask. Add 5.0 mL methyl salicylate and reflux the reaction mixture at its boiling point for 15 minutes using a stirrer
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activity can be affected by three factors‚ pH‚ salt‚ and temperature. In this project‚ we will be seeing how acidic fluids will affect the enzymatic reactions. Furthermore‚ this experiment will answer the following questions: What level of pH there must be in order for the reaction to slow down‚ or speed up? Are there specific levels of ph levels that speed up enzymes? Seeing that enzymes tend to do great on themselves‚ my hypothesis is that acid fluids (low pH levels) will actually hinder the enzymatic
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the blood. When you breathe‚ oxygen is inhaled into the lungs and carbon dioxide is exhaled. Normally these two gases are kept in balance by the respiratory system. Respiratory alkalosis occurs when carbon dioxide levels drop too low. This causes the pH of the blood to rise and become too alkaline. Some symptoms of respiratory alkalosis may include: dizziness‚ bloating‚ feeling light-headed‚ numbness and/or muscle spasms in the hands and feet‚ discomfort in the chest area‚ confusion‚ dry mouth‚ tingling
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