to verify a buffer’s ability to resist changes in pH with consecutive 1mL additions of either a strong acid (HCl) or base (NaOH). The experiment entailed preparing a combination 10 buffered and non-buffered solutions and then monitoring the pH changes as a strong acid or base was added to the solution. By performing this experiment‚ it was found that with increasing amounts of buffer in the prepared solutions there was better resistance against pH changes. This was because the strong acid or base
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http://doctor.ndtv.com/faq/ndtv/fid/6843/What_are_the_benefits_of_having_jackfruit_seeds.html?cp A. The seeds would give you around 135 kcal/ 100 gms. It is a rich source of complex carbohydrate‚ dietary fiber‚ vitamins like vitamin A‚ C and certain B vitamins‚ and minerals like calcium‚ zinc‚ and phosphorous. They contain lignans‚ isoflavones‚ saponins‚ that are called phytonutrients and their health benefits are wide-ranging from anti-cancer to antihypertensive‚ anti-ageing‚ antioxidant‚ anti-ulcer
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The digestive tract is a continuous tract throughout the body that interfaces with the environment at both its origin ‚the oral cavities‚ as well as‚ at its termination‚ the anus. It is divided into different segments beginning with the oral cavity and followed by the pharynx‚ esophagus‚ stomach‚ small and large intestine‚ and the anus. There are also accessory digestive organs involved including the salivary glands‚ liver‚ pancreas‚ and gallbladder. Digestion begins in the oral cavity where
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Results: The experimental results for part one is as follows: Part One Data Table | Initial pH | Final pH | Test Tube A | 6 | 1 | Test Tube B | 4 | 4 | Test Tube C | 4 | ----- | Test Tube D | 4 | 4 | Test Tube E | 6 | 11 | The experimental results for part two is as follows: Part Two Data Table | Before CO2 was Added | After CO2 was Added | Colour | Blue/green | Light green/yellow | pH Level | 8.0pH | 5.0pH | Discussion: For thousands of years‚ people have known lemon juice
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Introduction Acids and bases is an important aspect in chemistry. A specific example of such is in the body‚ acids and bases have to be balanced in order to provide the optimal pH in the system for normal physiological processes. Anything digested by the body has the ability to change the body’s standard (or current) pH. A pH of the body which is too acidic or too basic can lead to problems with one’s health1. An example of acid excess is hydrochloric acid in the stomach‚ causing someone to have acid
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different antacid tablets‚ thymol blue‚ droppers‚ pH probe and necessary cables‚ pH probe holder‚ retort stand‚ 1 mol/L HCl‚ droppers‚ five 150 mL beaker‚ mortar and pestle‚ graduated cylinder‚ balance‚ weighing dish‚ stir rod Procedure: 1) Gather all the equipment you will need to do the lab. You will be working in groups of 3 2) Calibrate the pH probe as you practiced the day before. Make sure your pH probe is properly calibrated. If your pH probe is not calibrated properly‚ then all of your
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BRONSTED-LOWRY ACIDS AND BASES 1. The Bronsted-Lowry definition There are many definitions of acids and bases in existence‚ but the most useful one is the Bronsted-Lowry definition: An acid is a substance which can behave as a proton (re presented as a hydrogen ion‚ H+) donor. Any substance which contains hydrogen bonded to a more electronegative element can thus behave as an acid: HCl == H+ + Cl- H2SO4 == H+ + HSO4- A base is a substance which can behave as a proton acceptor. Any
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decimal point) Formula used to calculate the average volume of sodium hydroxide used (ml) Average volume of sodium hydroxide used =(Accurate 1+Accurate 2)/2 Part 2: pH titration curves Strong acid-weak base titration Table V: Volume of ammonium hydroxide (ml) pH Volume of ammonium hydroxide (ml) pH 0.00 0.73 20.50 1.73 0.50 1.03 21.00 1.76 1.00 1.04 21.50 1.79 1.50 1.05 22.00 1.83 2.00 1.06 22.50 1.87 2.50 1.07 23.00
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acid-base titration can be detected by the use of a pH indicator‚ a pH meter‚ or a conductance meter. The use of a pH meter to quantitatively determine the end point of a titration reaction is preferred to the use of visual indicator. This is because the pH meter monitors the change in pH at the equivalence point rather than just observing the color change in the visual indicator‚ and this eliminates the indicator blank errors. The use of a pH indicator is often regarded as tedious as compared to
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with Starch at Specific pH ’s and Temperatures Page 1 Abstract Enzyme ’s are used as catalysts in certain reactions. They help lower the activation energy needed for the reaction to go to completion. At optimum temperature and pH the amount of collisions of substrate and enzyme is at its highest‚ any deviation from the optimum temperature and pH will result in the denaturization of the enzyme. The purpose of this experiment is to find the optimum temperature and pH for the reaction of Barley
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