Question

State reason for the following statements: (a) Tap water conducts electricity whereas distilled water does not. (b) Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does. (c) During summer season, a milk man usually adds a very small amount of baking soda to fresh milk. (d) For a dilution of acid, acid is added into water and not water into acid.

Answer 1

$<marquee>hello;here's ur ans mate</marquee>$

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1. .$<marquee>why do tap water conducts electricity whereas distilled water does not?</marquee>$

--} Tap water contains dissolved salts in it. These salts dissociates into ions when electricity passed through it which are responsible for the electricity conductivity of tap water. But distilled water does not contain any dissolved salts, so it does not conduct electricity.

2.$<marquee>Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does.</marquee>$

--} Dry hydrogen chloride gas does not turn blue litmus red when hydrochloric acid does. Give one reason. Acidity is due to the ability of giving H+ ion. Dry hydrogen chloride does not give hydrogen ions and so it does not act as an acid and does not turn blue litmus red.

3.$<marquee>During summer season, a milk man usually adds a very small amount of baking soda to fresh milk.</marquee>$

--} Baking soda acts as a bit like preservative. It makes milk a bit alkaline so as to reduce the pace of bacteria acting on it ,as they add acids (e.g. lactic acid) to the milk and turn it sour. this keeps the milk from becoming sour for a long time.

4.$<marquee>what do we do For a dilution of acid, acid is added into water and not water into acid.</marquee>$

--} So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container! If you add acid to water, the solution that forms is very dilute and the small amount of heat released is not enough to vaporize and spatter it. So Always Add Acid to water, and never the reverse.

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Answer 2

The reason for the given statements are written below:

• (a) Salts have been dissolved in tap water. When electricity passes through these salts, they separate into ions, which is what gives tap water its electrical conductivity. However, because there are no dissolved salts in distilled water, it does not conduct electricity.
• (b) Hydrochloric acid turns blue litmus red, but dry hydrogen chloride gas does not. Specify one cause. Acidity results from the capacity to produce H+ ions. Dry hydrogen chloride does not produce hydrogen ions, so it cannot function as an acid or cause blue litmus paper to turn red.
• (c) Baking soda has a preservative-like effect. It slightly alkalizes milk to slow down the rate at which bacteria attack it and add acids (such as lactic acid) that cause the milk to become sour. This delays the long-term sourness of the milk.
• (d) The heat that is released can cause the solution to boil violently and release concentrated acid from the container! When acid is added to water, a very diluted solution results, and the little heat that is released is insufficient to cause it to vaporize and splatter. Therefore, never add acid to water and always the opposite.

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