Chemistry > Water > Flashcards

Water Flashcards

(7 cards)

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1
Q

Hard Water

A

Will not form a lather easily with soap

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2
Q

Temporary Hardness

A

Can be removed by boiling

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3
Q

Primary Sewage Treatment

A

Screening and settlement

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4
Q

Secondary Sewage Treatment

A

Oxidation by microorganisms

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5
Q

Tertiary Sewage Treatment

A

Removal of phosphates and nitrates

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6
Q

Eutrophication

A

Presence of excessive nutrient content in a water body to an extent that causes overabundant plant growth

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7
Q

Biochemical Oxygen Demand

A

Amount of dissolved oxygen in ppm used up by the sample over a period of 5 days at 20 degrees in the dark

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