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Chemistry Unit 1A Review

Chemistry Unit 1A Review. Sources and Uses of Water. Cleaning Water. Filters remove solid materials Charcoal removes odor Distillation removes salts/ions/charged particles. Tyndall Effect. Positive = see the light = particles in the path of the light

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Chemistry Unit 1A Review

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  1. Chemistry Unit 1A Review Sources and Uses of Water

  2. Cleaning Water • Filters • remove solid materials • Charcoal • removes odor • Distillation • removes salts/ions/charged particles

  3. Tyndall Effect • Positive = see the light = particles in the path of the light • Negative = don’t see the light = no particles present

  4. Conductivity Test • Positive = conducts electricity =light bulb will lights up = charged particles/ions/salts are present • Negative = light bulb doesn’t light up = no charged particles/ions/salts

  5. Hydrologic Cycle • Groundwater = storage = aquifer • Percolation pond = replenishes groundwater Gas state Condensation Evaporation Liquid state

  6. Water Sources • San Jose • ground water (.62%) • Other • Glaciers - 2.11% • Lakes - .009% • Atomosphere - .001% • Rivers - 0.0001%

  7. Water Use • Main uses of water • irrigation (in the west) • heating/cooling (all others)

  8. Personal Use • watering (1130 L/hour) *** • washing (180-680L/time) • showers/toilets (19L/min or flush) **** • drinking, cooking (varies) • about 300 L per day per person

  9. Direct vs Indirect Uses of Water • Direct = used “last” • boiled egg = water boiled in • soup = water in soup • Indirect = used before, not always by person • boiled egg = water for chicken, grain, truck, carton • soup = water for can, chicken, grain, processing, label

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