8.4 Water 8.4.1 Water is distributed on Earth as a solid‚ liquid and gas y y y Define the terms solute‚ solvent and solution Solution a homogeneous mixture of two or more substances Solute a substance that is dissolved in another substance or the component of a solution present in a lower amount. Solvent a substance which can dissolve another substance or the component of a solution present in a greater amount. Identify the importance of water as a solvent Water is essential as a reactant
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it shares hydrogen atoms. it gains or loses neutrons. 0 out of 5 The correct answer is: it gains or loses electrons. Question 7 of 20 The symbol 3CO2 represents one atom of oxygen and three atoms of carbon. three atoms of carbon and one molecule of oxygen. three molecules of carbon dioxide. one atom of carbon and three atoms of oxygen. 0 out of 5 The correct answer is: three molecules of carbon dioxide. Question 8 of 20 In water‚ hydrogen bonding occurs between the hydrogen and an oxygen
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wrong or in other words they are a lay. Instead Lactate acid is made of Lactate ion called (Lactate) and Hydrogen Ion. C3H6O3----->C3H5O3++H- C2H3OHCOOH--------->C2H3OHCOO+ +H- Hydrogen ion is the acid in lactate acid‚ it interfere with electrical signals in muscles and nerves‚ slows energy reactions‚ and impairs muscle contraction. The burn up we feel in intense exercise is the cause of hydrogen ion. During this experiment(Muscle fatigue lab) it will be seen that after a while of squeezing a small
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color changes when sodium bromide solution is reacted with chlorine water and iodine solution (separately). 8. Observe what happens when 3M sulfuric acid and potassium permanganate are added to hydrogen peroxide antiseptic. Observe what happens when potassium permanganate is added to hydrogen peroxide
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OxidatiOn and ReductiOn OxidatiOn & ReductiOn 9.2 9 Introduction to oxidation and reduction Redox equations Some common oxidising agents and reducing agents (EXT) 9.3 Reactivity 9.4 Voltaic cells 19.1 Standard electrode potentials (AHL) 9.5 Electrolytic cells 19.2 cORe 9.1 Electrolysis (AHL) TOK Are oxidation numbers real? I remember contemplating on the nature of reality back in Chapters 2 and 4‚ with regard to electrons and hybridization respectively
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THE 4 QUALITIES OF GOOD WATER by Dr. Robert O. Young There are many measurements of water‚ but the most important for determining the best water to drink are‚ the pH‚ oxidative reduction potential—or energy potential/activity—molecular structure‚ and purity. Science has helped us to determine that the best measurements for our drinking water are the pH and purity‚ but little understood is the importance of the molecular structure of water. Assuming that most waters that humans are drinking
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2.3 Amorphous forms‚ solid dispersions and cocrystals. Stable crystal forms of drugs pose problem in solubilization due to higher lattice energy. So‚ in regards to solubility‚ disordered amorphous forms provide distinct advantage over crystal forms. Hence‚ changing the solid state characteristics of pharmaceutical API renders the molecule more water soluble. But‚ excess of enthalpy‚ entropy and free energy of amorphous forms make them prone to crystallization leading to the formation of stable crystals43
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formed by chemical reactions. In order to extract the gas I will use several household products such as vinegar‚ baking soda‚ water‚ and hydrogen peroxide in order to create the gases to be tested. Materials: Student Provided 1 Match 1 Toothpicks (or wooden splints) 1 Pie tin or similar 1 Marker pen 1 Household white vinegar 1 3% Hydrogen peroxide (H2O2)
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a cheap method to produce hydrogen. A method of industrial synthesis of hydrogen and oxygen through electrolysis was developed by Dmitry Lachinov in 1888. Electrolysis of water requires excess energy in the form of over potential to overcome barriers. Without the excess energy the electrolysis of water happens very slowly or not at all. Water has an electrical conductivity about one 1‚000‚000 of seawater. The Purpose of electrolysis is to separate water into Hydrogen and Oxygen gas. My hypothesis
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Self-assessment practice tests Test 1 – Material from Chapters 2–4 | 45 minutes 1 The kinetic theory suggests different arrangements for the atoms or molecules in the three states of matter. The diagrams below show how evidence suggests the particles are arranged in the three states of matter. 1 2 3 What are the three states shown? 1 A B C D 2 gas liquid solid liquid 2 liquid gas liquid solid 3 solid solid gas gas The graph shows the heating curve for a metal that is solid at room temperature (25
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