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The difference between hard and soft water
Collect some hard water from a stream(or make some as defined in the next experiment). Also secure some soft water like as rain water or distilled water. Make some soap solution by dissolving soap shavings or powdered soap in a little warm water. Place equivalent amounts of hard and soft water in every of two bottles. Add soap solution to the soft water with a dropper, some drops at a time. Shake the bottle well after every addition. Count the number of drops of soap solution required to produce suds about 1 cm thick on the top.
Dew-point temperature You can calculate the dew-point temperature with a shiny can having some water, a thermometer and some ice. The dew-point temperature is an significant we
why there is 28 day in february month
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what is benzoin condensation and what are the results of it and the uses of this reaction
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1. The solid wastes from a summer camp with 100 children and a staff of 25 are to be collected once per week. If bottles and cans (representing 20% of the weight) are removed, pape
Explain Vaginal Bacteria - External Defence Mechanism Vaginal bacteria: Certain bacteria normally live in the vagina. They produce lactic acid, which kills the bacteria. Hence,
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