Water - Water Treatment

Reorder the following in order of the stages of water treatment.

• Flocculation

• Filtration

• Screening

• Sedimentation

• Chlorination

Tags

NGSS.HS-ESS3-4

Flocculation is ...

• The coming together (coagulating) of small suspended particles in water.

• The coming together (coagulating) of large suspended particles in water.

• The coming together (coagulating) of large dissolved particles in water.

• The coming together (coagulating) of small dissolved particles in water.

Why is H₂SO₄ sometimes added to water in water treatment?

• ↓ pH

• Softens H₂O

•  ↑ pH

• Sterilises H₂O

Why is aluminium sulphate sometimes added to water in water treatment?

• ↓ pH

• Flocculation

•  ↑ pH

• Sterilises H₂O

Why is chlorine sometimes added to water in water treatment?

• ↓ pH

• Flocculation

•  ↑ pH

• Sterilises H₂O

Why is fluorine sometimes added to water in water treatment?

• ↓ pH

• Flocculation

•  ↑ pH

• ↓ teeth decay

Why is calcium hydroxide sometimes added to water in water treatment?

• ↓ pH

• Flocculation

•  ↑ pH

• ↓ teeth decay

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Why is sodium carbonate sometimes added to water in water treatment?

• Softens H₂O

• Flocculation

•  ↑ pH

• ↓ teeth decay

What is done water for dental care?

• Activated sludge is added to the water.

• The water aerated.

• Fluoride containing compounds are added to the water.

• Chlorine containing compounds are added to the water.

What word means the solid particles that have settled out during the sedimentation process of water treatment.

• Sediment

• Solubility

• Settlement

• Solidifying