Biology & Life Sciences

Is Water colourless ?

There are two kinds of water: salt water and fresh water. Salt water contains large quantities of salt, while fresh water has a dissolved salt concentration of less than 1%. Only fresh water can be used as drinking water. 

Water is the only substance on earth that is found naturally in three forms: liquid, solid and gas. A small drip from a faucet can waste as much as 75 litres of water a day !! Water covers around 70% of the Earth’s surface. On average, every kilogram (2.2lb) of seawater contains around 35 grams (1.2 oz) of dissolved salt. 

Over 68 Percent of Fresh Water on Earth is Trapped in Glaciers. The freezing point of water lowers as the amount of salt dissolved in at increases. With average levels of salt, seawater freezes at-2 °C (28.4 °F).2

Less than 1% of the water supply on earth can be used as drinking water. The earth is a closed system that rarely loses or gains extra matter. Essentially, this means that the same water that existed on earth millions of years ago is still present today. 

Our bodies are 60-70% water our brains are 75% water our lungs are nearly 90% water and our blood is about 82% water.  The water is in fact not colorless. Even pure water is not colorless, but has a slight blue tint to it, best seen when looking through a long column of water.

The blueness in water is not caused by the scattering of light, which is responsible for the sky being blue.  water blueness comes from the water molecules absorbing the red end of the spectrum of visible light.

To be even more detailed, the absorption of light in water is due to the way theatoms vibrate and absorb different wavelengths of light. 

Water is Tasteless:

Because, It has equal amount of H+ ions and equal amount of OH- ions. H+ ions are Sour in taste where as OH- ions are bitter.Both are equal means, neither sour nor bitter.

Pure water is odourless

Because, our receptors are mostly made of water mucus, because of which we don’t feel any taste.With minerals added into it, you feel slightly tasty while drinking the water. Not all raindrops are made of water: Rain also consists of sulfuric acid or methane, which can also be found on other planets in the solar system. Water is usually more dense than ice. Ice and liquid water may be madeof the same stuff, but those molecules arrange themselves in different ways depending on whether they’re in a liquid or solid state. The average woman needs about 2.7 liters of water per day.  The average man needs about 3.7 liters per day.

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