AIMS At the end of the experiment‚ students should be able to synthesise pure aspirin using chemical tests such as esterification and recrystallization independently and to also find out the melting point range of aspirin using melting point determination. INTRODUCTION Aspirin‚ which is also known as acetylsalicylic acid‚ is one of the commonly used and widely found in any drugstore or pharmacy. Its properties make aspirin a well-rounded drug that reduces inflammation and fever and also relieves
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EXPERIMENT 1 “HOW DO I LOVE THEE LET ME COUNT THE WAYS...” DETERMINATION OF AVOGADRO’S CONSTANT Techniques Calibration drop counting MSDS available for • • stearic acid‚ CH3(CH2)16COOH cyclohexane‚ C6H12 Principles molar volume molecular structures surface areas and volumes Avogadro’s constant percent error Recommended Advanced Reading Chapter 3 in Petrucci‚ Herring‚ Madura‚ & Bissonnette’s General Chemistry‚10th Ed. Avogadro Constant...1 INTRODUCTION
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Blessings aren’t something that comes around too often. They don’t come with a huge wave of light from the sky or even thunderbolts to the head. They start as an insignificant moment that would normally be ignored by the everyday average person. I pondered unfortunate circumstances and appreciate kindness large or small. Oneday I took a break from school to grab some coffee and get things off my mind‚ I was just fighting back the tears. A woman in front of me paid for my coffee and when I realized
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manager left us to talk. We were just chatting about boxing and I was asking questions about how many fights he had won. He said just over 18 in his career. He asked me how any I had won and I told him six so far. We had a good chat and a cuple of moments later he said‚ ‘Will you be able to
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The mostly stressful moments I have experienced in my life is during my exam time. Exam stress is an unfortunate part of life as for me. When I am getting ready for exams often feel a lot of pressure‚ which can result in nervousness and anxiety. I feel a certain level of pressure due to the expectations of my family and also myself. To overcome this problem‚ I set up a S.M.A.R.T goals (specific‚ measurable‚ attainable‚ relevant‚ and linked to time frame) to manage my stress. To achieve my specific
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John Trimble 9 January 2003 How Fight Club Changed My Life Once‚ I was a young boy who believed everything I heard‚ yet I knew nothing. I was impressionable and weak. Above all else‚ I was confused. I did not understand myself‚ and I did not realize why I wasn’t happy. Everything always went wrong. I felt my life slipping away into oblivion with no palpable meaning. My life was an endless array of homework‚ band camp‚ theater‚ girls‚ and a myriad other things that were not making me happy
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Mayella’s Moment Pa came stormin’ through the front room‚ cussin’ a’me‚ madder than a wet hen‚ an’ his face more ruddy than my legs after yesterday’s beatin’. I knowed I was done for; Pa’d seen me kissin’ Tom through the window. I cowered to the corner of the room‚ hopin’ that Pa’s beatin’ on me ain’t gonna be so bad‚ though Pa was drunker than Cooter Brown. He showed his teeth‚ “You damned girl. Watcha doin’ cuddlin’ to that nigger-boy? You was tryin’ to kiss that nigger!” Pa slurred. His eyes
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Unforgettable Moments in My Life Unforgettable Moments in My Life Sitting on my bed with my Acer notebook on my lap‚ I was looking through my family photos. I always did this when I started to miss the warmth and laughter at home. It had been a year since I made College Abdillah my second home. With no doubt‚ home was always my best refuge‚ but at college‚ my second home‚ I had experienced precious memories that I would never forget in this life. Everything started on the first day I stepped into
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Practical 1: Observation of mitosis in garlic root tips Introduction The practical will involve the preparation‚ observation‚ and classification‚ of the various stages of mitosis by observing garlic root tips using a microscope. The study comes under the heading of cytogenetics which is the visual characterisation of genetic material and the study of how that material reacts during the life of the cell. Strictly speaking‚ mitosis is the division of the nucleus into two daughter nuclei that are
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MY LAST MOMENTS WITH MY FATHER In the year 1992‚ Senegal was‚ for the first time‚ the capital of the African football. The African nation football cup was taking place in Dakar and Ziguinchor. Everybody was very exciting to have the best players of the continent in Senegal and it may be the year to win the African cup for the first time. With all that excitement‚ I kind of forgot that my dad was very sick and he too wanted people to forget that he was seriously ill. It began‚ one cold night
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