Question

Q1. A small amount of hydrochloric acid is produced in the stomach ? It is useful or harmful for us ? If access of acid is produced in stomach what should we do ?

Q2. Define the following (with example) -
1. Acidic Salt
2. Basic Salt
3. Neutral Salt

Q3. Write the formula
1. Copper chloride
2. Ammonium sulfate
3. Potassium carbonate
4. Sodium acetate
5. Magnesium phosphate
6. Aluminium chloride
7. Sodium nitrite
8. Calcium sulphate

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Answer 1

Answer:

1. A small amount of hydrochloric acid is produced in our stomach which is useful for us as hydrochloric acid kills the germs in the food that we eat and helps in digestion. Although, if excess of this acid is produced in the stomach, it causes acidity and heartburn.
2. Acid salts are a class of salts that produce an acidic solution after being dissolved in a solvent. Its formation as a substance has a greater electrical conductivity than that of the pure solvent. An acidic solution formed by acid salt is made during partial neutralization of diprotic or polyprotic acids.          Examples : NH₄Cl , Al(NO₃)₂

        ii) A basic salt is any salt that hydrolyzes to form a basic solution. Another definition of a basic salt would be a salt that contains amounts of both hydroxide and other anions. White lead is an example. It is basic lead carbonate, or lead carbonate hydroxide.

      iii)  Neutral salt : A salt resulting from the neutralization of an acid by a base and having no acidic or basic character, especially when dissolved in water.

        Example: NaCl

    3. Copper chloride : CuCl₂

        Ammonium Sulphate : (NH₄)₂SO₄

        Potassium  Carbonate : K₂CO₃

         Sodium acetate   :  NaCH₃COO

         Magnesium Phosphate : Mg₃(PO₄)₂

         Aluminium Chloride : AlCl₃

          Sodium Nitrate : NaNO₂

          Calcium Sulphate : CaSO₄

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Answer 2

${\sf{Answer - 1}}$

Yes hydrochloric acid is useful for us. The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins. The acidic gastric juice also kills bacteria. If it is produced in excess ,than it will result in acidity , ulcer ,or inflammation. It can be cured by neutralizing the excess acid by mild base like Milk of Magnesia , ENO etc.

${\sf{Answer - 2}}$

1. Acid salts are a class of salts that produce an acidic solution after being dissolved in a solvent. Example - ${\sf \ NaHSO_{4} , \ NH_{4}Cl \ etc. }$
2. Alkali salts or basic salts are salts that are the product of incomplete neutralization of a strong base and a weak acid. Example - ${\sf \ CaCO_{3} , \ Na_{2}CO_{3} \ etc. }$
3. A salt resulting from the neutralization of an acid by a base and having no acidic or basic character, especially when dissolved in water.Example - ${\sf \ NaCl , \ K_{2}SO_{4} \ etc. }$

${\sf{Answer - 3}}$

1. ${\sf \ CuCl_{2}}$
2. ${\sf \ (NH_{4})_{2}SO_{4}}$
3. ${\sf \ K_{2}CO_{3}}$
4. ${\sf \ CH_{3}COONa}$
5. ${\sf \ Mg_{3}(PO_{4})_{2}}$
6. ${\sf \ AlCl_{3}}$
7. ${\sf \ NaNO_{3}}$
8. ${\sf \ CaSO_{4}}$

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