The Mass of Acetylsalicylic Acid in Aspirin ------------------------------------------------- Purpose The purpose of the lab is to determine the mass of the ‘active ingredient’ in a commercial ASA tablet. ------------------------------------------------- ------------------------------------------------- Introduction There are three main theories surrounding acids and bases including the Arrhenius‚ Bronsted-Lowry‚ and Lewis theories. The Arrhenius theory of acids and bases states that
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Introduction The purpose of this lab was to test different antacids‚ to find out which would be the most effective to take. Stomach acid problems come from a overproduction‚ and build up of gastric acid (HCl). In order to determine which antacid is the more effective‚ four different brands of antacids were chosen‚ and tested. The purpose of an antacid is to balance out the pH inside a person’s stomach. PH is the measurement of molar concentration of hydrogen ions that are present in the solution
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calculate the molarity of a NaOH solution by titrating the base with 5mL of standard HCl solution in each trial. By adding the base with unknown molarity to the acid with 0.10M the molarity of NaOH can be calculated. The base‚ NaOH‚ helps bring the pH of the acid‚ HCl‚ closer to seven‚ which neutralizes it. When using the buret the amount of NaOH used is able to be determined. Then by writing a balanced chemical equation and using the titration formula‚ Nb+Ma+Va=Na+MbVb ‚ the molarity is able
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solution‚ or in other words containing a weak acid and its conjugated base‚ pH is not significantly changed. As a result‚ the hydrogen ions concentration increases less than what would be expected due to the amount of acid added. Following a similar process‚ adding a strong base consumes much less hydrogen ions than anticipated. Adding a strong acid or base would seriously change the pH of the solution in the absence of the buffer. In the experiment‚ standardization of NaOH with HC1 solution is carried
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Sodium carbonate‚ Na2CO3‚ also known as washing soda or soda ash‚ is a sodium salt of carbonic acid. It can be extracted from the ashes of many plants and has a cooling alkaline taste. It is one of the most basic industrial chemicals. The acid’s Ph scale is always lower than 7.
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Determining the Production of Glucose During Changes in Temperature and pH‚ and Manipulation of Specificity and Cofactors BIOL-1406-SL8 November 16‚ 2012 Abstract Enzymes are biological catalysts. They work by lowering the activation energy needed to initiate a chemical reaction. Enzymes work within an optimal temperature and optimal pH. Enzymes are highly specific for a single substrate. The Enzyme is usually much larger in size than the substrate it binds to. In some cases‚ an enzyme requires
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Biochem. J. (1995) 305‚ 17-20 (Printed in Great Britain) 17 RESEARCH COMMUNICATION The effect of low temperatures Nicole MORE‚ Roy M. DANIEL* and Helen H. PETACH on enzyme activity Thermophile Research Unit‚ University of Waikato‚ Private Bag 3105‚ Hamilton 2001‚ New Zealand The stability of two enzymes from extreme thermophiles (glutamate dehydrogenase from Thermococcales strain ANI and f‚- enzymes‚ glucosidase from Caldocellum saccharolyticum expressed in Escherichia
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Experiment #1: Carbohydrate Digestion • Tube 1 Digestion Lab – 3 ml water • Tube 2 – 3 ml 0.2% amylase • Tube 3 – 3 ml 0.2% amylase + 10 drops of 1.0M HCl • Tube 4 1 2 4 3 – 3 ml 0.2% amylase – place in hot water bath for 5 min Experiment #1: Carbohydrate Digestion • Add 5.0 ml starch solution to each tube • Incubate in 37°C bath for 1.5 hr • Divide contents of each tube evenly into 2 tubes – Lugol’s Test – Benedict’s Test Experiment #1: Carbohydrate
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Moment of Inertia and Rotational Motion Garret Hebert PHY 2311 Tues 1:00 garret.hebert@hindscc.edu Abstract: During this lab we will study what rotational Inertia is and how different shapes of masses and different masses behave inertially when compared to each other. We will specifically study the differences of inertia between a disk and a ring. We will use increasing forces to induce angular acceleration of both a disk and a ring of a certain mass. We will then then measure the differences
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n this lab experiment factors that affected solubility are temperature‚ liquids‚ concentration‚ pressure‚ polarity‚ and molecule. In this experiment we use temperature‚ centrifuge‚ and concentration solutions to be able to achieve the results that we wanted. Step one of the experiment was to mix HCl‚ to cause a precipitation form‚ after that we had to decant the solution‚ then we used a centrifuged to separate the the precipitate of the supernatant liquid. After the decant was done‚ then the process
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