splint near the mouth of the test tube to test for the presence of hydrogen gas. We notice one of the products is lead iodide which is insoluble so it precipitates out and indeed its colour is yellow. 3) Mg + 2 HCl = MgCl2 + H2 3. Electrolysis of water Use a U-tube with electrodes at each end‚ connected to a battery. Fill the U-tube with water. Turning on the battery‚ observe the results at each electrode. Next‚ test for hydrogen and oxygen gas produced at each end of the tube. Electrolysis
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structure of all biological membranes. Phospholipid bilayers have a polar head along with a hydrophobic‚ or water-hating‚ tail. The fact that positively charged ions are attracted to the oxygen in water and negatively charged ions are attracted to the hydrogen allows water to dissolve compounds important for survival. Biochemicals are carbohydrates‚ lipids‚ proteins‚ and nucleic acid. Lipids do not dissolve in water because they are nonpolar. Carbohydrates are soluble in water. Protein can be both hydrophilic
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then the gas is oxygen. When hydrogen is being tested‚ a burning splint will be used and when the splint is placed in to the mystery gas and a “pop” sound occurs‚ then the gas is hydrogen. When carbon dioxide is being tested‚ limewater will be added to the gas (produced by combining hydrochloric acid and sodium bicarbonate)‚ if the limewater turns cloudy or turns milky then the gas is carbon dioxide. Question What is the effect of different reactants on
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Numerical Studies of Microcombustion in a Micro-channel There are a lot of methods that converts chemical energy to thermal energy like fuel cells. But combustion is the most important one to obtain thermal energy from various fuels including hydrogen‚ natural gas‚ fuel oils because of its more energy output. Microcombustion is a potential energy source for small devices like unmanned vehicles and micro satellites .It is to be carried out in a miniature device called Microcombustor which is
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within other compounds. Two hydrogen atoms and an oxygen atom make one molecule of water-in formulae it is written as H2O). At ambient temperatures‚ the water molecules are at liquid state. This differs with other molecules like hydrogen sulphide which have slightly greater molecular masses and are gasses at room temperatures. The construction of the molecule creates a polar nature. This is in which the electrons are shared unequally. The oxygen atom is larger than the hydrogen atom. The oxygen nucleus
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rain? Acid rain is the term for pollution caused ... of one oxygen atom and two hydrogen atoms. The oxygen atom also called the "apex of the water molecule" bears a slight electronegative charge while hydrogen possesses a more positive one (Kirk 225). Because of the opposite charges attract‚ the water molecules are drawn together. When an oxygen atom is linked to a molecule’s hydrogen atom‚ a bond called a hydrogen bond is formed (Kirk 256). There are several types of water molecule such as liquid
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Hulsey Fire Tech 107 15 November 2015 Hydrogen Peroxide According to Lee Lerner‚ (2008)‚ “Hydrogen Peroxide is most widely found in homes in brown bottles containing three percent solutions (3% hydrogen peroxide and 97% water).” Lee Lerner (2008) writes “Hydrogen Peroxide is a colorless liquid that mixes with water and is widely used as a disinfectant and bleaching agent.” Hydrogen Peroxide is used in many different ways and has different hazards. “Hydrogen peroxide is a strong oxidizing agent used
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Hydrogen peroxide is a substance that contains two hydrogen atoms and two oxygen atoms. Hydrogen peroxide is a weak acid and does not react formally with base substances. Catalase is found in many foods like beef liver‚ carrots‚ wheat sprouts‚ and potatoes‚ and more. Catalase is released when a protein is coming into the stomach a protein catalase goes and transforms the protein into food for human’s internal cells. Bubbles in an experiment where a raw potato is put into hydrogen peroxide
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compounds that contain‚ primarily‚ carbon and hydrogen. Whereas the organic compound can contain other elements‚ the bond between carbon and hydrogen are what makes a compound organic. The original organic chemistry was defined the study of compounds by living organisms. Inorganic chemistry is the chemistry that deals with the properties and behavior of inorganic compounds. Inorganic compounds are those that are not biological‚ and not containing any hydrogen and carbon bonds. We can state that inorganic
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the aim was to determine which combinations of each solutions created precipitate and which did not. The prac proved to work in achieving this for most examples‚ although few were anomalous and did not give sound results. Take for instance‚ barium chloride and silver nitrate shown in the discussion. The result shown was cloudy and appeared to have precipitated where in actuality it should not have. It is also good to note that some instances of a precipitate not forming visibly may be due to it being
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