Water Quality and TDS Levels

The video tutorial explores the measurement of Total Dissolved Solids (TDS) in various water samples, including bottled, filtered, rain, river, tap, swimming pool, and sea water. It explains what TDS is, highlighting the presence of organic and inorganic substances like magnesium, calcium, and potassium. The experiment results show that bottled and filtered water have low TDS, making them ideal for drinking, while sea water has the highest TDS due to its mineral content. The video emphasizes that TDS only measures dissolved solids, not bacteria or harmful organisms.

What types of water samples are being tested in the experiment?

• Only bottled and tap water

• Only swimming pool and sea water

• Various types including sea, river, and rainwater

• Only filtered and bottled water

What does TDS stand for in the context of water quality?

• Total Dissolved Solutions

• Total Dissolved Salts

• Total Dissolved Substances

• Total Dissolved Solids

Which inorganic substances are commonly found in water?

• Sodium, chloride, and fluoride

• Lead, mercury, and arsenic

• Magnesium, calcium, and potassium

• Iron, zinc, and copper

What is the TDS range for bottled and filtered water, making them ideal for drinking?

• 1 to 50

• 51 to 100

• 151 to 200

• 101 to 150

Why does rainwater have a low TDS level?

• It is treated with chemicals

• It is mixed with distilled water

• It is heavily filtered

• It undergoes evaporation and condensation

What is the TDS level of the Chao Phraya River water sample?

• 213

• 121

• 76

• 50

What is the average TDS measurement for tap water?

• 76

• 213

• 50

• 121

What contributes to the high TDS level in swimming pool water?

• Natural minerals

• Organic matter

• Additives like chlorine and algaecides

• High salt content

What is the typical TDS range for seawater?

• 500 to 30,000 ppm

• 51 to 100 ppm

• 1 to 50 ppm

• 30,001 to 50,000 ppm

Which of the following is NOT typically found in seawater?

• Chlorine

• Sodium

• Iron

• Sulfate