daily day life. So let’s start with telling the definitions of them. Starting with acids‚ they are a substance which dissociates in water in order to produce one or more hydrogen ions. Also we can write H+ instead of hydrogen ion. Bases have the same definition‚ although the difference is that it firm hydroxide ions instead of hydrogen ions. We can write OH- instead of hydroxide ion. All alkali is bases but not all bases are alkali. However a base is normally a metal oxide or hydroxide. If the base
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well as much of biological systems; for instance‚ the human body consists of approximately 70% of water‚ and in other biological organisms this figure could even be 95%. This largely relies on the bonding of water‚ whereby two hydrogen atoms bond to one oxygen atom; hydrogen bonding is the strongest intermolecular force due to its high polarity. Hence‚ what is the biological importance of water? Water as a transport medium in plants The properties of water make it an essential molecule to all forms
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Discussion and Scientific Explanations The reaction was conducted using granular tin and hydrochloric acid. This mixture provided both a source of electrons and protons1. The electrons worked as the reducing agent in this mechanism1. Granular tin was chosen over a single plate of tin due to the fact that it would take much more time and effort to fully dissolve a single plate of tin. A plate of tin would be more bonded to each other and less likely to be reactive. With the addition of the concentrated
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Almost everything in our world has some of their origins from chemicals‚ scientists in the chemical industries are always working to find ways to make these chemicals useful to us‚ they bring improvements into daily use substances like paints‚ medicines‚ cosmetics and plastics‚ so that they are more environmentally sustainable‚ and efficient. Scientists employed in the chemical industry trained and specialising in chemistry are called chemists. A chemist can gain expertise in a range of chemistry
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BINARY COMPOUNDS -Compose of two kinds of atom Polyatomic Ion | Name | OH-1 | hydroxide | SO4-2 | sulfate | PO4-3 | phosphate | NO3-1 | nitrate | CO3-2 | carbonate | HCO3-1 | hydrogen carbonate or bicarbonate | ClO3-1 | chlorate | NH4+1 | ammonium | TWO NON-METALS - Give the name of the positive ion followed by the negative ion ending with -ide -Greek prefixes are used CO-carbon monoxide CO2-carbon dioxide NO-nitrogen
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observe the reaction. Next‚ place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas. When magnesium and hydrochloric acid are mixed it starts boiling. 4. 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. When you turn on the battery‚ bubbling happens.
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Module 7 Exam Review ANSWER KEY 1. Define acid. (7.01) An acid is a substance that produces hydrogen ions‚ H+ or hydrodium ionsH3O+ in solution. 2. Compare the three theories of acids. (7.01) An Arrhenius acid is a substance the increases the concentration of hydrogen ion‚ H+ or hydronium ions H3O+when dissolved in water. You must have water. A BrØnsted-Lowry acid is any substance that donates a hydrogen ion‚ H+ to another substance. A Lewis acid is any substance that accepts a lone pair of electrons
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left c) to the right 4. Remove the CO2 gas being produced 5. concentrations and totals in equilibrium change over time. 6. a) The solution will be yellow. K2CrO4 ( K2+(aq) + CrO42-(aq) b) The solution will be orange. The hydrogen ion will react with chromate to form an equilibrium and produce some dichromate and water. This reaction will cause the amount of chromate to decrease in order to form more products and the equilibrium will shift to the right. c) The NaOH
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1 a The diagram shows the parts of a hydrogen atom. [pic] Use words from the list to label the diagram. electron group nucleus symbol (2) b Hydrogen can be used as a clean fuel for cars. i When hydrogen burns in air‚ it reacts with another element. Complete the word equation for this reaction. hydrogen + ................... → water (1) ii Suggest one reason why hydrogen is called a clean fuel. (1)
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of each metal into a test-tube containing about 5 Ml cold distilled water. If a reaction is not visible‚ heat the water until it boils. 3. If bubbles of gas are produced‚ test the gas with a lighted splint. If a ‘pop’ sound is heard‚ the gas‚ hydrogen‚ is present. Part C: Reaction of Metals with Acids 1. Pour 5 Ml of hydrochloric acid into each of the eight test tubes. (Make sure to wear eye protection and skin protection in order to prevent harm or contact with the Hydrochloric Acid).
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