5. Explain in detail‚ the range of natural variation of and factors contributing to the following major parameters in freshwater: a. Dissolved Oxygen b. Biochemical Oxygen Demand c. Conductivity d. Nutrients e. pH f. Alkalinity g. Hardness 6. Explain how each of the above major parameters affects organisms and the structure and function of freshwater ecosystems. Summary Chemical composition of freshwaters • Define where freshwaters
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why did you make them? After I selected my fish‚ I noticed that the tank began to grow algae. The next time I selected fish and invertebrates‚ I chose to add cleaner shrimp and snails to my tank. The pH then started to go up‚ then down‚ and then up again so I added pH buffer solution so the pH could stabilize at 8.1. After that‚ I decided to add water to keep the specific gravity from getting too high and maintaining stable. 3. What problems‚ if any‚ did you have with any of the fish
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enzymes opt temp is about 35 Celsius while Prokaryotes in hot springs have opt temp of 70 Celcius Ph Ionic interactions between charged amino acids also hold enzymes together These interactions are sensitive to [H+] bc. changing concentration CHANGES THE BALANCE between negative and positively charged amino acids – therefore affects shape since these interactions hold enzyme together Most enzymes ph range = 6-8 Some enzymes can maintain 3D shape even in extremely acidic/basic environment Pepsin
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method and the potentiometric method. In classical method‚ the endpoints of the two indicators (phenolphthalein and methyl orange) were determined using titration method. In the potentiometric method‚ the progress of the titration was monitored using a pH meter. B. Introduction Sodium carbonate is an important industrial chemical. It is used in the manufacture of soap‚ glass‚ paper and as a source of alkalinity‚ that is‚ as a base. Glass‚ paper and as a source of alkalinity‚ that is‚ as a base
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color. A change in the pigments will cause the light to reflect differently and a color change to occur. Testing for pH is an example of a color changing reaction. The pH of the solution will change the pigment on the litmus paper or in the indicator. Acids and bases change the pigments in different ways‚ which causes the indicator to change different colors depending on the pH. A precipitate is formed: A chemical reaction has occurred if two liquids are poured together and a solid (called a
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Alkaline soil is referred to by some gardeners as”sweet soil”. The pH level of alkaline soil is above 7‚ and it usually contains a great deal of sodium‚calcium and magnesium. (1) Alkaline soil occurs in areas with high limestone content‚ easy souble phosphorus and calcium binding‚ formation of insouble calcium salts of phosphorus‚ reducing the effectiveness of phosphorus. Also‚ in calcareous soils‚ boron‚ manganese‚ molydenum‚ zinc‚ iron greatly reduces the effectiveness of the crop often feel inadequate
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An antacid works by neutralizing the acid in your stomach and increasing pH levels. Our stomach is normally at pH levels of around 2 to 3. When we eat food‚ our stomach produces acid to help digest the food. However when we eat to much‚ our stomach produces too much acid and pH levels may drop below 2. This is when we start to experience heartburn‚ and that’s precisely when the antacids become useful. It helps to bring pH levels back to around 3 to 4‚ and often offers quick relief. Antacids
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Matter 5.7.1 Kinetic Energy and Molecular Speeds 5.7.2 Maxwell-Boltzmann distribution of molecular speeds Unit 6 : Thermodynamics 6.6.1. Second Law of Thermodynamics 6.8. Third Law of Thermodynamics Unit 7 : Equilibrium 7.12.1 pH of Buffer Solutions Class XII Unit 16 : Chemistry in Everyday Life 16.4.2.1 Antioxidants 3 Unit 5: States of Matter 5.7.1 KINETIC ENERGY AND MOLECULAR SPEEDS As you have studied in the previous section the molecules
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NaOH CH3COONa + H2O When the titrations end point is determined and volumes of reactants are measured the concentration of the ethanoic acid can be calculated. Keywords: Titration‚ Sodium Hydroxide‚ Ethanoic Acid‚ Equivalence Point‚ pH Meter‚ Standard Solution Method: Using a bulb pipette 25cm3 of vinegar was measured into a 250cm3 standard flask and using deionised water the total volume was made up to 250cm3. A second bulb pipette was used to measure 25cm3 of the prepared
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vs planted cells regarding the PH and EC levels. There are three types of media that were tested for this green roof research/experiment project; Gaia‚ Haydite‚ and ZinCo (Growing Media). For this experiment there are 3 tubs of‚ each tub has 1 kind of media as listed above‚ they will be tested for EC and PH levels. Also 9 cell trays that have three media types (Gaia‚ Haydite‚ ZinCo Growing Media) that contain plants will be tested as well for the same thing (EC & PH)‚ the tubs contain the same media
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