Ammonium bromide NH4Br Used in photography 7 Ammonium chloride NH4Cl Used in photography 8 Ammonium carbonate (NH4)2CO3 Smelling salts 9 CaCO3 Limestone/chalk 10 Sodium chloride NaCl Table salt 11 Calcium chloride CaCl2 De-icer for snow on roads 12 Calcium hypochlorite Ca(ClO)2 Swimming pool disinfectant 13 Ammonium nitrate NH4NO3 Used in fertilizer 14 Ammonium phosphate Na3PO4 Used in fertilizer 15 Calcium oxide CaO Used to make plaster 16 Carbon dioxide CO2 Dry ice 17 Chromium oxide Cr2O3 Green pigment
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of these bases are hydroxides‚ carbonates‚ or bicarbonates. The following table contains a list of the active ingredients found in several common commercial antacids‚ and the reactions by which these antacids neutralize the HCl in stomach acid. Compound Chemical Formula Chemical Reaction Aluminum hydroxide Al(OH)3 Al(OH)3(s) + 3 HCl(aq) -----> AlCl3(aq) + 3 H2O(l) Calcium carbonate CaCO3 CaCO3(s) + 2 HCl(aq) -----> CaCl2(aq) + H2O(l) + CO2(g) Magnesium carbonate MgCO3 MgCO3(s) + 2 HCl(aq) ----->
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falls and sinks into the ground. As the rainwater continues into the ground‚ it meets with the limestone. Limestone is mostly made up of the mineral calcium carbonate (CaCO3)‚ which is not very soluble‚ so the rocks don’t dissolve very quickly. But‚ if you add an acid‚ you add hydrogen ions (H+)‚ which will react with the carbonate to form hydrogen carbonate (HCO3- ions)‚ which are extremely soluble in water‚ therefore the limestone will start to dissolve. In the USA‚ sinkholes tend to occur in Florida
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For the seventh experiment we will be performing different type of test to see how different chemical react with each other. The first experiment will be a demonstration the professor will give to the class. the first experiment you will be performing will include a test tube you will add a couple drops of dilute hydrochloric. you will add this to five little pieces of zinc metal. In next experiment you will performed you will put 2 ml of 3% hydrogen peroxide solution in a test tube .you will also
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dsUnzh; fo|ky; laxBu नई दिल्ली अध्ययन / सहायता सामग्री िसवीीं कक्षा ववज्ञान क ललए े dsUnzh; fo|ky; laxBu lEHkkxh; dk;kZy;] vkbZ- vkbZ- Vh- dSEil] iobZ] eqEcbZ& 400076 1 Acknowledgements CHIEF PATRON : SHRI AVINASH DIKSHIT COMMISSIONER‚ Kendriya Vidyalaya Sangathan(HQ) New Delhi SHRI PRL GUPTA‚ ASSISTANT COMMISSIONER‚ Kendriya Vidyalaya Sangathan Mumbai Region SHRI SK VERMA EDUCATION OFFICER‚ Kendriya Vidyalaya Sangathan Mumbai Region SMT. AP BHALLA EDUCATION OFFICER‚ Kendriya Vidyalaya
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1. CaBr2 (aq) + K3PO4 (aq) → CA(PO4)2(S) + KBr (aq) = Ca3(PO4)2 + 6 KBr Double Replacement 2. Li(s) + O2(g) = Li2O(s) =2 Li2O Decomposition 3. CH4 + O2 = CO2 + H2O = CO2 + 2 H2O Combination 4. AgBr(s) = Ag (s) + Br2(l) = 2 Ag + Br2 Combination 5. Mg(s) + H2SO4 (aq) = MgSO4 + H2 Decomposition Table Three: Formation of Salt via Double Replacement Reaction 0.1 KNO3 * (NO3)2 0.1 M AgNO3 0.1M NaCl Tube 1: KNO3+NaCl Tube 3: Fe(NO3)3+NaCl Tube
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produce carbonic acid and carbonate ions thus‚ decreasing the pH. Ocean acidification affects the ecology of everything on this planet. Mainly‚ the marine ecosystems and small organisms take a large hit from the increases in temperature and carbonic acid concentration. The acidification causes reductions in ecological niches and brings about evolutionary processes with harmful outcomes. Shells in the ocean have calcification impeded by the increasing carbonic acid and carbonate ion concentration. The
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PLANT CELL Introduction Plant cell is the basic unit of structure and function in nearly all plants. The range of specialization and the character of association of plant cells are very wide. In the simplest plant forms a single cell constitutes a whole organism and carries out all the life functions. In just slightly more complex forms‚ cells are associated structurally‚ but each cell appears to carry out the fundamental life functions‚ although certain ones may be specialized
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body of the rock. Eventually the surface layers split off or spall from the lower layers‚ sometimes in slightly curved sheets like the layers of an onion. Seen especially in granite. Crystal Growth (Salt Weathering) Salt crystals‚ such as sodium carbonate and magnesium sulphate grow within spaces in a rock. It happens when saline water enters cracks in rocks then evaporates. The growing crystals prise the rock apart and small pieces break off. This process is especially effective in semi-arid areas
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shell that the clam produces as it grows. The lines form bands which represent about a years growth. Mollusks shells are hard due to the presence of the compound calcium carbonate. A thin membrane called the mantle lines the inside of both shells and protects the internal organs. The mantle contains shell glands that secrete calcium carbonate‚ creating the shell. An incurrent siphon is where water that contains foods and oxygen enters through here. Waste products of digestion and respiration are eliminated
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