yield of product‚ increasing the limiting reactant‚ possibly‚ is the most effective. In this experiment we were able to calculate limiting reactants from the reaction of CaCl2. 2H2O + K2C2O4.H2O(aq). As a group‚ we obtained our salt mixture of calcium chloride and potassium oxalate‚ and weighed the mixture. We were able to make an aqueous solution from the mixture and distilled water. We boiled and filtered off the solution‚ leaving the precipitate. Once the precipitate was dried overnight‚ it was
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an insufficient adenosine production as a result of decreased mitochondrial phosphorylation. A result of a decrease in adenosine triphosphate (ATP) is anaerobic metabolism‚ which contributes to a change in the intracellular ion balance of sodium‚ calcium‚ and potassium ions (McCance & Huether‚ 2013). Hypoxia Induced Sodium and Potassium Shifts
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the mucus. This movement of water is a result of chloride and sodium transport across the membrane. This method‚ along with other mechanisms is what ensures fluidity of the mucus‚ resulting
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detection of anions in a given solution. Method: CO3 Solution Iodine Solution 6M Nitric Acid SO4 Solution Sulphric Acid(H2SO4) Chloride Solution 6M Asetic Acid(CH3COOH) Barrium Chloride(BaCl2) 6M HCl(Hydrochloric acid) Silver Nitrate(AgNO3) 1M Potassium Nitrate(KNO2) Calcium Chloride (CaCl2) Barrium Hydroxide Ammonium Hydroxide (NH3OH) Methylene Chloride Test Tube/Test Tube Holder Eye Dropper Eye Dropper Beaker Pipette Pipette Bulb Litmus Paper Hot Plate Observations/Calculations:
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NSS Chemistry Part 3 Metals HKCEE Past Paper Questions – Structural Questions 1. HKCEE 1995 Q1 Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger then that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory.
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‘Kinetics’ is the study of chemical reactions. The speed of a reaction can vary depending on many variables such as the nature of the reactants‚ particle size‚ concentration and temperature. For a chemical reaction to occur‚ there must be a collision between reactants. The reaction rate is slower when the reactants are large and complex molecules because it takes longer for the molecules to combine together creating a chemical reaction. More than 2000 years ago‚ Democritus‚ who was a philosopher
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Paragraph 1 The polymorphs involved are the halides in tetragonal rutile (TiO2) structure and the halides in so-called calcium chloride structure. As the name implies‚ the unit cell of halides in tetragonal rutile structure is tetragonal‚ with the lattice parameters a=b≠c and α=β=γ=90o. It belongs to the space group P42/mnm. On the other hand‚ the unit cell of halides in calcium chloride structure is orthorhombic‚ i.e. a≠b≠c and α=β=γ=90o. The space group of this CaCl2 structured polymorph is Pnnm.
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with alkenes. SAFETY Eye protection must be worn. Concentrated phosphoric acid is corrosive. Mop up spillages immediately with plenty of water. Cyclohexene and cyclohexanol are highly flammable. Keep away from naked flames. Anhydrous calcium chloride is an irritant. PREPARATION 1) Weigh out between 9 and 10 grams of cyclohexanol directly into a 250cm3 round-bottomed‚ quickfit flask. Record accurately the mass of alcohol
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from the reaction‚ and is catalyzed by shaking‚ or heating. This gas is the cause of the pressure buildup within the flask‚ as well as the bubbles. The last step in removing all of the water from the distillate is a process called drying. Sodium Chloride and sulfate is used in the drying procedure because the sodium will dissolve in the water‚ causing the stranded water molecules in the organic layer to diffuse out of the product. One way to increase the yield of isopentyl acetate could be to use
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solution‚ and catalysts will be tested to determine how they influence the rate of reaction. Materials: 1. Goggles 2. Powdered calcium carbonate (CaCO3) 3. Metal scoop 4. Marble chips 5. Cold water 6. Hot water 7. Room temperature water 8. 1M hydrochloric acid (HCl) 9. 3 M HCl 10. Iron (III) chloride (FeCl3) 11. Sodium chloride (NaCl) 12. Calcium chloride (CaCl2 ) 13. Potassium nitrate (KNO3) 14. 0.3% hydrogen peroxide (H2O2) solution 15. 8 test tubes 16. Test tube rack 17. 3 250mL
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