Pollution Solution: Contaminated Water Problem

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Pollution Solution Contaminated Water Problem

• Water, water everywhere and not a drop to
  drink

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What is Fresh water????

• What does that phrase mean to you?
• What criteria are most important in order for
  water to be drinkable?

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Can we drink it?Yes we can!

• For each cup of water, what can be done to make
  it safer to drink?

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Filtering Water

• What substances can be removed by filtering?

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WORD WALL

• Dissolve
• Solution
• Soluble
• Insoluble
• Filtration

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Dissolve

• TO BREAK DOWN INTO SMALLER PARTICLES THAT CANNOT
  BE SEEN WITH THE NAKED EYE. FORMS A CLEAR
  SOLUTION.

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SOLUTION

• A CLEAR MIXTURE FORMED WHEN A SUBSTANCE
  COMPLETELY DISSOLVES IN ANOTHER SUBSTANCE

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SOLUBLE

• ABLE TO DISSOLVE IN A LIQUID

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INSOLUBLE

• NOT ABLE TO BE DISSOLVED

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FILTRATION

• THE PROCESS OF REMOVING UNDISSOLVED (INSOLUBLE)
  PARTICLES FROM A LIQUID.

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THE BIG QUESTION

• Take a look at the ACME water. Do you think it
  can be filtered? Why or why not? HINT Do you
  think it contains DISSOLVED or UNDISSOLVED
  particles?
• HOMEWORK Respond to Acmes e-mail, USING ALL 5
  VOCAB words.

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Understanding Solutions

• Do all substances dissolve the same way?

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Word Wall

• Solubility
• Solute
• Solvent

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Solubility

• The ability of a substance to dissolve in another

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Parts of a Solution

• SOLUTE
• The substance that dissolves
• SOLVENT
• The liquid that has the solute dissolved in it.

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Describing Solutions

• Are all solutions created equal?

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WORD WALL

• CONCENTRATION
• DILUTE
• CONCENTRATED
• SATURATED

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CONCENTRATION

• The amount of solute dissolved in a solution

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Describing Concentration

• DILUTE
• Having a LOW concentration of solute
• Concentrated
• Having a HIGH concentration of solute

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SATURATED

• MAXIMUM CONCENTRATION. No more solute can be
  dissolved.
• If you add any more, it will not dissolve, and
  usually sink to the bottom.

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Measuring Concentration

• How can we express the concentration of a
  solution?

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Word Wall

• Concentration
• Parts per million (ppm)

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PERCENT CONCENTRATION

• C Volume of SOLUTE X 100
• TOTAL volume of solution
• Percent Parts per hundred

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PARTS PER MILLION (ppm)

• Volume of solute x 1,000,000
• Volume of solution

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Why use ppm over Percent?

• Good for very small numbers. Avoid confusion
  from missing a zero past the decimal.

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Converting to ppm

• Ppm x 10,000
• Examples
• 1 10000ppm
• 0.00003 0.3 ppm
• 0.005 ?

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Is Dilution the Solution to Pollution?

• Can we dilute the ACME wastewater to clean it?

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Dilution Problem

• Acme makes 500 liters of 1300 ppm water each day.
  How much water would they need to dilute it to
  0.3 ppm?

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Dilution Formula

• C1 x V1 C2 x V2
• C1 OLD Concentration
• V1 OLD Volume
• C2 NEW Concentration
• V2 NEW Volume