what is an equivalent mass of acid base salt explain??
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Equivalent mass of acid, base, salt.
Acids contain one or more replaceble hydrogen atoms. The number of replaceble hydrogen atoms present in a molecule of the acid is referred to its basicity.
1.Equivalent mass of the acid
Equivalent mass of an acid is the number of parts by mass of the acid which contains 1.008 part by mass of replaceble hydrogen atom.
Equivalent mass of the acid = molar mass of an acid / No. of replaceble hydrogen atom
= molar mass of the acid / basicity of the acid
For example, the basicity of sulphuric acid is 2.
Equivalent mass of H2SO4 = Molar mass of H2SO4 / 2 = 98/2 = 49
2.Equivalent mass of the base
Equivalent mass of a base is the number of parts by mass of the base
which contains one replaceable hydroxyl ion or which completely neutralises one gram equivalent of an acid. The number of hydroxyl ions present in one mole of a base is known as the acidity of the base. Sodium hydroxide, potassium hydroxide, ammonium hydroxide are examples of monoacidic bases.
Calcium hydroxide is a diacidic base
In general,
equivalent mass of a base = molar mass of the base / acidity of the base
Equivalent mass of KOH = 56 /1 = 56
3.Equivalent mass of a salt
Equivalent mass of a salt is a number of parts by mass of the salt that is produced by the neutralisation of one equivalent of an acid by a base.
In the case of salt like potassium chloride, the salt formed by the neutralisation of one equivalent of an acid by a base.
KOH + HCl -> KCl + H2O
Therefore, the equivalent mass of the salt is equal to its molar mass.
Acids contain one or more replaceble hydrogen atoms. The number of replaceble hydrogen atoms present in a molecule of the acid is referred to its basicity.
1.Equivalent mass of the acid
Equivalent mass of an acid is the number of parts by mass of the acid which contains 1.008 part by mass of replaceble hydrogen atom.
Equivalent mass of the acid = molar mass of an acid / No. of replaceble hydrogen atom
= molar mass of the acid / basicity of the acid
For example, the basicity of sulphuric acid is 2.
Equivalent mass of H2SO4 = Molar mass of H2SO4 / 2 = 98/2 = 49
2.Equivalent mass of the base
Equivalent mass of a base is the number of parts by mass of the base
which contains one replaceable hydroxyl ion or which completely neutralises one gram equivalent of an acid. The number of hydroxyl ions present in one mole of a base is known as the acidity of the base. Sodium hydroxide, potassium hydroxide, ammonium hydroxide are examples of monoacidic bases.
Calcium hydroxide is a diacidic base
In general,
equivalent mass of a base = molar mass of the base / acidity of the base
Equivalent mass of KOH = 56 /1 = 56
3.Equivalent mass of a salt
Equivalent mass of a salt is a number of parts by mass of the salt that is produced by the neutralisation of one equivalent of an acid by a base.
In the case of salt like potassium chloride, the salt formed by the neutralisation of one equivalent of an acid by a base.
KOH + HCl -> KCl + H2O
Therefore, the equivalent mass of the salt is equal to its molar mass.
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equivalent mass is the total mass of the acid base salt divided by their charge in separation.
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