must regulate is water; water is everywhere in our body and its balance is essential for proper body function. A very carefully regulated process is solute concentration. If there is a sudden increase in water which enters the extracellular fluid‚ sodium ions will then contribute less to the extracellular solute concentration as the ratio between water and solute has now changed. Osmolality is the amount of solute in a kilogram‚ hence the osmolality in the extracellular space has also decreased.
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They are very reactive metals and do not occur freely in nature. Alkali metals are malleable‚ ductile‚ and are good conductors of heat and electricity. Alkali metals can also explode if they are exposed to water. The Alkali metals are: lithium‚ sodium‚ potassium‚ rubidium‚ cesium‚ and francium. Lithium The mineral petalite‚ which contains lithium‚ was discovered by a Brazilian scientist named Jose Bonifacio towards the end of the 18th century. Then in 1817‚ lithium was discovered by Johan August
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citrate and sodium carbonate were mixed together‚ then the products were filtered out as so only the precipitate remained. The filtered paper was then dried and the mass of the precipitate in the experiment divided by the theoretical mass of the precipitate from the calculated gave the percent yield. The percent yield that was acquired is about 69.1%. The chemical reaction that took place was that sodium displaced calcium in a solution of calcium nitrate‚ and that calcium displaced sodium in a solution
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Case Study: Newsflash! Transport Proteins on Strike! 1. What is the meaning behind the PHOSPHOLIPIDS’ chant? Phospholipids make up most of the cell membrane‚ in a phospholipid bilayer. Phospholipid molecules form two layers‚ with the hydrophilic (water loving) head facing the extracellular fluid and the cytosol (intracellular) fluid‚ and the hydrophobic (not water loving) tails facing one another. The cell membrane is constructed in such a way that it is semipermeable‚ and allows oxygen
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different compounds. A compound is a chemical substance that consists of two or more different chemically bonded elements. In this experiment‚ several different compounds are being worked with – potassium iodide‚ lead (II) nitrate‚ acetic acid and sodium bicarbonate. The purpose of this experiment is to determine whether or not a reaction has taken place using qualitative and quantitative analysis. Procedure Part 1 - Qualitative observations of both potassium iodide and lead (II) nitrate were
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Example of Investigatory Project USING POTASSIUM CARBONATE AND SODIUM BORATE AS FIRE RETARDANT IN DIFFERENT KINDS OF CLOTH Team Category Cluster 2 Applied Science Charalin Mae P. Chavez Ashley D. Tumulak Khent Bernard F. Bensi Babag National High School (Science Class) table of contents Title Page ……………………………………………………… i Table of Contents ……………………………………………………… ii Abstract ……………………………………………………… iv Research Plan Research Materials ………………………………………………………1
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silicates in the glass are attacked by the HF(aq). Sodium silicate(Na2SiO3)‚ for example reacts as follows: 1 Na2SiO3(s) + 8 HF(aq) H2SiF6(aq) + 2NaF(aq) + 3H2O(l) a. How many moles of HF are needed to react with 0.300 mol Na2SiO3? b. How many grams of NaF form when 0.500 mol of HF reacts with excess sodium silicate? c. How many grams sodium silicate can react with 0.800 g of HF? 4. Automotive air bags inflate when sodium azide‚ NaN3‚ rapidly decomposes to its component
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Animation: Cells & Chemistry Glycolysis After viewing the animation‚ answer these questions. 1. Cells derive energy from the oxydation of nutrients‚ such as glucose . 2. The oxidation of glucose to pyruvate occurs through a series of steps called glycolsis . 3. How many carbons are in a molecule of glucose? 6 4. The energy related during these oxydation reactions is used to form adenosine triphosphate (
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25 mL of sodium iodate solution was added to each flask. Using 10 mL and 25 mL graduated cylinders‚ the following volumes of CaCl2 solution with a concentration of 22 g/L was added to the Erlenmeyer flasks. In flask 1‚ 5 mL of CaCl2 solution was added. In flask 2
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Department of Chemistry Chemistry Revision Unit II (Edexcel) (01) a) When lithium nitrate and sodium nitrate are heated separately‚ both decompose giving oxygen gas as one of the products. (i) Which of these two nitrates would decompose at the lower temperature? .........................................................………………………………………….................... (ii) Give the name of any other product formed when sodium nitrate is heated. .........................................................…………………………………………
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