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Identify the order of hardness for the 5 solutions provided A, B, C, D, and E by testing them with soap and other compounds
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Chemistry Coursework Hardness of Water Obada Sawalha Year 10 BCB Aim: To identify the order of hardness for the 5 solutions provided A, B, C, D, and E by testing them with soap and other compounds. Hypothesis: * The softer the water the harder the water. * The harder the water the more scum is produced. * The softer the water the closer it is to PH 7. * The softer the water the less residue it makes with the other compounds. Scientific Knowledge: Water is an essential element in every day life, life cannot be without water. Both the earth and the human body consist of roughly 70% water out of the total mass. Water can come in two modes, hard water and soft water. Water is meant to be soft but when it mixes with some compounds it becomes hard. Hardness is caused by Limestone, Chalk and Gypsum. Hard water is identified by the fact that it produces no or little...
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