CHEMISTRY-WINE MAKING | Investigating the effectiveness of common fining agents on homemade fruit wine with respect to Turbidity‚ Sediment level‚ Ph and Alcohol content. | | Year 12 Chemistry | Extended Experimental InvestigationA comparison of chemical flocculation agents | Mario Mitov | Mrs Cullen 2011 | | Contents: 1.0- Abstract 2.0- Introduction/Background
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which point should the titration be stopped and the volume of titrant used be recorded? Answer : when the solution reaches the endpoint Question = Buffers are substances‚ or mixtures of substances‚ that (help maintain a relatively constant pH when small amounts of acids or bases are added) Question= Which of the following statements best describes what determines whether an acid is a strong acid or a weak acid? (the degree to which it dissociates in water) Question = The
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Biology- Change in pH Aim: To investigate the affect that change in pH levels has on a particular enzyme‚ in this case amylase. Hypothesis: In this investigation I expect as the pH reaches the optimum level‚ the rate of reaction will be fastest‚ compared to other pH levels. It is also suspected that after the enzyme has reached optimum level the enzyme activity will decrease. Through further study of the optimum level of amylase I found that the enzyme usually has an optima pH of 8. It is known
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This was done by spotting each of the 5 drop samples from each pH level‚ with each pH level being on a different piece of paper. Then the spot was allowed to dry and sprayed with ninhydrin to test for the presence of amino acid with gentle heat applied from hot plate. TLC of Amino Acid Fractions: Another TLC plate was spotted comparing the most concentrated fraction from each of the pH levels with the unknow mixture. The TLC developing jar was prepared with 4:1:1 propanol/acetic
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each day. As you might expect‚ the exact amount of these ions in the urine varies with the amount in the diet. The ammonium ion (NH4+) is produced by the deamination of amino acids in the kidney. Ammonia is an important compound in the regulation of pH because it accepts a proton to form the ammonium ion‚ which can then be excreted in the urine. This process gives our bodies a way to remove protons from the blood. High levels of the ammonium
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the loss of oxygen‚ blood glucose‚ and waste removal? A: Oxygen and blood glucose are essential ions that are necessary for the pumping of the heart. Their delivery to the heart will slow down. Carbon dioxide levels will increase -- this causes the Ph levels to drop. Mitochondria will no longer have oxygen and glocose‚ which is needed to make ATP. This causes cells to die. ff Assuming Joesph’s heart has stopped‚ what cellular processes and membrane functions are going to be affected by the loss
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determining the equilibrium constants for their ionization reactions in water. Is to use their measured pH values to calculate the pKa for the two unknown weak acids thus determining their identities. Hypothesis: If we neutralize a solution that contains a weak acid by adding a strong base to the solution‚ then the ions will be isolated and thus finding the concentrations of each species by measuring pH levels and determining [H3O+] possible. Background: In order to completely ionize the weak acid‚ a
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rain is measured using a scale called “pH.” The lower a substance’s pH‚ the more acidic it is. What is ph? A figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral‚ lower values are more acid‚ and higher values more alkaline. The pH is equal to log10 c‚ where c is the hydrogen ion concentration in moles per lite Describe the ph range and list various things that correspond to the various ph levels. The pH scale goes from 0 - 14‚ with 7 being neutral;
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Chapter 3: Water and Life Overview: Life as we know it requires water. All organisms that we know of are made mostly of liquid water‚ and most of their metabolism requires an aqueous medium. In addition‚ many organisms live in liquid water or in an environment dominated by water in its various states (solid‚ liquid‚ or gas). Some numbers: cells are typically 70% or more water by mass about 75% of the Earth’s surface is covered by liquid water But then‚ just being common on the Earth doesn’t
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EFFECT OF pH ON ENZYMATIC ACTIVITY Jenelle C. Faustino‚ John Gambit B. Garcia‚ Fatima S. Jusay‚ Oliver Alexander B. Lao and Eunice L. Licudine Group 4 2 E Medical Technology Biochemistry Laboratory ABSTRACT Enzymes are substances that are produced by living organisms and act as catalysts in order to speed up or chance a chemical reaction without changing itself at the end of the reaction. Invertase was extracted first from baker’s yeast. Determination of the effects of changes in pH on enzymatic
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