Note on Salt

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The neutral substance formed by the reaction between acidic radical and basic radical is known as salt.

Types of salt:

  1. Neutral salt: The salt which is obtained after the reaction between weak base and weak acid or strong base and strong acid is called neutral salt. It does not show any change in indicators. Example: NaCl
  2. Acidic salt: That salts which is produced after the reaction between strong acid and weak base is known as acidic salt. They show acidic behavior. Example: Sodium bisulphate (NaHSO4).
  3. Basic salt: Those salts which are obtained after the reaction between Sodium acetate strong base and weak acid are known as basic salt. Example: Sodium Carbonate (Na2CO3)

Properties of salt:

  • Common salt is an essential constituent of our diet. It is salty in taste. Some other salts have bitter taste and some are tasteless.
  • The salts of K, Na, Al, etc. are white in color or colorless while salts of Cu, Fe, Mn, etc are colored.

    http://img.diytrade.com/cdimg/1400714/19313460/0/1299640439/Potassium_Salt.jpg

    Fig: Salt of potassium (K)

    http://www.micromeshminerals.com/full-images/manganese-chloride-mncl-sub-2-sub-1005023.jpg

    Fig: Salt of Manganese (Mn)
  • Most of the salts are soluble in water and only few are insoluble. The solution of salt can conduct electricity.
  • Neutral salts are generally neutral to indicators. But acidic salts show acidic behavior and basic salts show basic behavior.

Preparation of salts

  1. Direct combination of elements (metals and non-metals) Fe + S → FeS (Iron sulphide)
  2. By the Action of acids on metal. Zn + H2SO4 → ZnSO4 + H2
  3. By the action of acid on metallic oxides. FeO + 2HCl → FeCl2 + H2O
  4. By the neutralization of acid and base NaOH + HCl → NaCl + H2O
  5. By the action of metallic carbonates on acid CaCO3 + 2HCl → CaCl2+ H2O + CO2

Uses of salts:-

  1. Sodium chloride is used as a preservative and also used in our diet.
  2. Silver nitrate is used as a laboratory reagent.
  3. Silver bromide is used in photography.
  4. Ammonium sulphate and potassium nitrate are used as chemical fertilizers.
  5. Sodium bicarbonate is used in the manufacture of baking powder.
  6. Sodium carbonate is used in the manufacture ofsoap,detergents and glasses.

    http://www.appliancesonlineblog.com.au/wp-content/uploads/2013/07/laundry-detergent-powder-vs-liquid-1.jpg

    Fig: Detergent powder used for washing clothes

    http://cdn.dailypainters.com/paintings/an_ordinary_glass_other_still_life__still_life__57c27d6b0a97e91500c5cc45366f4682.jpg

    Fig: Glass
  7. Ammonium chloride is used as a good electrolyte in thedry cell.

  • The neutral substance formed by the reaction between acidic radical and basic radical is known as salt.
  • There are three types of salts. They are Neutral salt, Acidic salt and Basic salt.
  • Common salt is an essential constituent of our diet. It is salty in taste. Some other salts have the bitter taste and some are tasteless.
  • Salts of K, Na, Al, etc. are white in color or colorless while salts of Cu, Fe, Mn, etc. are colored.
  • Most of the salts are soluble in water and only a few are insoluble
  • Neutral salts are generally neutral to indicators.
  • Acidic salts show acidic behavior and basic salts show basic behavior.
  • Salts are used as a preservative and also used in our diet, laboratory reagent, chemical fertilizers, etc.
  • Salts are also used as a good electrolyte in the dry cell.
.

Very Short Questions

The two names of salts that are insoluble in water are: a. Copper carbonate (CuCO3) b. Lead carbonate (PbCO3) The salts insoluble in water are used to produce different colors.

  1. The common name of sodium carbonate is washing soda. It is used for softening water and making glass.
  2. The common name of Magnesium sulphate is Epsom salt. It is used as medicine.
  3. The common name of potassium nitrate is saltpeter. It is used for making fertilizer and gun powder.

The two general methods of preparation of salts are given below:

  1. By the action of acids with alkali. NaOH + HCl → NaCl + H2O
  2. By direct combination of elements. 2Fe + 3Cl2 → 2FeCl3

The three properties of salt are:

  1. Usually salts are neutral substance. But some salts are acidic in nature while other shows the basic nature.
  2. Most of the salts are white and colorless but some salts are colorful.
  3. Most of the salts have bitter taste. Some salts are tasteless but sodium chloride salt has salty taste.

The salt which is formed by the reaction between strong acid and weak base is called acidic salt e.g. Sodium hydrogen sulphate (NaHSO4). The salt which is formed by the reaction between strong base and weak acid is called basic salt e.g. Sodium hydrogen carbonate (NaHCO3).

The reaction in which acid and base reacts together to form neutral salt and water is called neutralization. E.g. HCl + NaOH → NaCl + H2O (Acid) (Base) (Salt) (Water)

0%
  • Base turns red litmus paper into ______.

    yellow


    pink


    blue


    doesnot react with litmu paper


  • The neutral substance formed by the reaction between acidic radical and basic radical is known as ______.

    none of above


    base


    salt


    acid


  • Sodium sulfate is a normal salt whereas Sodium bisulfate is an ______ salt.

    acidic salt


    basic salt


    normal salt


    amphoteric salt


  • ______ is used in manufacture of fertilizers.

    copper nitrate
    ammonium nitrate
    lead nitrate
    sodium chloride
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ashutosh joshi

why na2so4 is called neutral salt?


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