Equivalent Mass
The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass.
The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions.
(a) Equivalent mass of an acid
It is the mass of an acid in grams which contains 1.0078 g of replaceable `H^(+)` ions or it is mass of acid which contains one mole of replaceable `H^(+)` ions. It may be calculated as :
Equivalent mass of acid=`("Molecular mass of acid")/("Basicityof acid ")`
Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid
(b) Equivalent mass of a base
It is the mass of the base which contains one mole of replaceable `OH^(-)` ions in molecules.
Equivalent mass of base=`("Molecular mass of acid ")/("Acidity of acid")`
Acidity of base= Number of replaceable `OH^(-)` ions present in one molecule of the base
Equivalent mass of an oxidising agent
(a) Electron concept:
Equivalent mass of oxidising agent =`("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule")`
(b) Oxidation number concept:
Equivalent mass of oxidising agent=`("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent")`
Equivalent mass of `Ba(MnO_(4))_(2)` in acidic medium is :(where M stands for molar mass)
Equivalent Mass
The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass.
The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions.
(a) Equivalent mass of an acid
It is the mass of an acid in grams which contains 1.0078 g of replaceable `H^(+)` ions or it is mass of acid which contains one mole of replaceable `H^(+)` ions. It may be calculated as :
Equivalent mass of acid=`("Molecular mass of acid")/("Basicityof acid ")`
Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid
(b) Equivalent mass of a base
It is the mass of the base which contains one mole of replaceable `OH^(-)` ions in molecules.
Equivalent mass of base=`("Molecular mass of acid ")/("Acidity of acid")`
Acidity of base= Number of replaceable `OH^(-)` ions present in one molecule of the base
Equivalent mass of an oxidising agent
(a) Electron concept:
Equivalent mass of oxidising agent =`("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule")`
(b) Oxidation number concept:
Equivalent mass of oxidising agent=`("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent")`
Equivalent mass of `Ba(MnO_(4))_(2)` in acidic medium is :(where M stands for molar mass)
The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass.
The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions.
(a) Equivalent mass of an acid
It is the mass of an acid in grams which contains 1.0078 g of replaceable `H^(+)` ions or it is mass of acid which contains one mole of replaceable `H^(+)` ions. It may be calculated as :
Equivalent mass of acid=`("Molecular mass of acid")/("Basicityof acid ")`
Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid
(b) Equivalent mass of a base
It is the mass of the base which contains one mole of replaceable `OH^(-)` ions in molecules.
Equivalent mass of base=`("Molecular mass of acid ")/("Acidity of acid")`
Acidity of base= Number of replaceable `OH^(-)` ions present in one molecule of the base
Equivalent mass of an oxidising agent
(a) Electron concept:
Equivalent mass of oxidising agent =`("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule")`
(b) Oxidation number concept:
Equivalent mass of oxidising agent=`("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent")`
Equivalent mass of `Ba(MnO_(4))_(2)` in acidic medium is :(where M stands for molar mass)
A
M/5
B
M/6
C
M/10
D
M/2
Text Solution
Verified by Experts
The correct Answer is:
C
|
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Shm - Equivalent Mass
The mass of one mole of a substance in grams is called its
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Equivalent Mass The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass. The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions. (a) Equivalent mass of an acid It is the mass of an acid in grams which contains 1.0078 g of replaceable H^(+) ions or it is mass of acid which contains one mole of replaceable H^(+) ions. It may be calculated as : Equivalent mass of acid= ("Molecular mass of acid")/("Basicityof acid ") Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid (b) Equivalent mass of a base It is the mass of the base which contains one mole of replaceable OH^(-) ions in molecules. Equivalent mass of base= ("Molecular mass of acid ")/("Acidity of acid") Acidity of base= Number of replaceable OH^(-) ions present in one molecule of the base Equivalent mass of an oxidising agent (a) Electron concept: Equivalent mass of oxidising agent = ("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule") (b) Oxidation number concept: Equivalent mass of oxidising agent= ("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent") Equivalent mass of Fe_(0.9)O in reaction with acidic K_(2)Cr_(2)O_(7) is : (M= Molar mass)
Equivalent Mass The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass. The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions. (a) Equivalent mass of an acid It is the mass of an acid in grams which contains 1.0078 g of replaceable H^(+) ions or it is mass of acid which contains one mole of replaceable H^(+) ions. It may be calculated as : Equivalent mass of acid= ("Molecular mass of acid")/("Basicityof acid ") Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid (b) Equivalent mass of a base It is the mass of the base which contains one mole of replaceable OH^(-) ions in molecules. Equivalent mass of base= ("Molecular mass of acid ")/("Acidity of acid") Acidity of base= Number of replaceable OH^(-) ions present in one molecule of the base Equivalent mass of an oxidising agent (a) Electron concept: Equivalent mass of oxidising agent = ("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule") (b) Oxidation number concept: Equivalent mass of oxidising agent= ("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent") Equivalent mass of Fe_(0.9)O in reaction with acidic K_(2)Cr_(2)O_(7) is : (M= Molar mass)
A
`7(M)/(10)`
B
`10(M)/(7)`
C
`7(M)/(9)`
D
`9(M)/(7)`
Equivalent Mass The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass. The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions. (a) Equivalent mass of an acid It is the mass of an acid in grams which contains 1.0078 g of replaceable H^(+) ions or it is mass of acid which contains one mole of replaceable H^(+) ions. It may be calculated as : Equivalent mass of acid= ("Molecular mass of acid")/("Basicityof acid ") Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid (b) Equivalent mass of a base It is the mass of the base which contains one mole of replaceable OH^(-) ions in molecules. Equivalent mass of base= ("Molecular mass of acid ")/("Acidity of acid") Acidity of base= Number of replaceable OH^(-) ions present in one molecule of the base Equivalent mass of an oxidising agent (a) Electron concept: Equivalent mass of oxidising agent = ("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule") (b) Oxidation number concept: Equivalent mass of oxidising agent= ("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent") Which of the following is not a disproportionation reaction?
Equivalent Mass The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass. The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions. (a) Equivalent mass of an acid It is the mass of an acid in grams which contains 1.0078 g of replaceable H^(+) ions or it is mass of acid which contains one mole of replaceable H^(+) ions. It may be calculated as : Equivalent mass of acid= ("Molecular mass of acid")/("Basicityof acid ") Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid (b) Equivalent mass of a base It is the mass of the base which contains one mole of replaceable OH^(-) ions in molecules. Equivalent mass of base= ("Molecular mass of acid ")/("Acidity of acid") Acidity of base= Number of replaceable OH^(-) ions present in one molecule of the base Equivalent mass of an oxidising agent (a) Electron concept: Equivalent mass of oxidising agent = ("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule") (b) Oxidation number concept: Equivalent mass of oxidising agent= ("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent") Which of the following is not a disproportionation reaction?
A
`P_(4)+NaOH toNaH_(2)PO_(2)+PH_(3)`
B
`BaC_(2)+N_(2) to Ba(CN)_(2)`
C
`Hg_(2)I_(2) to HgI_(2)+Hg`
D
`Ca(OH)_(2)+Cl_(2) to CaOCl_(2)+H_(2)O`
Equivalent Mass The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass. The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions. (a) Equivalent mass of an acid It is the mass of an acid in grams which contains 1.0078 g of replaceable H^(+) ions or it is mass of acid which contains one mole of replaceable H^(+) ions. It may be calculated as : Equivalent mass of acid= ("Molecular mass of acid")/("Basicityof acid ") Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid (b) Equivalent mass of a base It is the mass of the base which contains one mole of replaceable OH^(-) ions in molecules. Equivalent mass of base= ("Molecular mass of acid ")/("Acidity of acid") Acidity of base= Number of replaceable OH^(-) ions present in one molecule of the base Equivalent mass of an oxidising agent (a) Electron concept: Equivalent mass of oxidising agent = ("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule") (b) Oxidation number concept: Equivalent mass of oxidising agent= ("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent") Equivalent weight of oxalic acid salt in following reaction is :( Atomic masses:O=16,C=12,K=39) H_(2)C_(2)O_(4)+Ca(OH)_(2) toCaC_(2)O_(4)+H_(2)O
Equivalent Mass The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass. The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions. (a) Equivalent mass of an acid It is the mass of an acid in grams which contains 1.0078 g of replaceable H^(+) ions or it is mass of acid which contains one mole of replaceable H^(+) ions. It may be calculated as : Equivalent mass of acid= ("Molecular mass of acid")/("Basicityof acid ") Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid (b) Equivalent mass of a base It is the mass of the base which contains one mole of replaceable OH^(-) ions in molecules. Equivalent mass of base= ("Molecular mass of acid ")/("Acidity of acid") Acidity of base= Number of replaceable OH^(-) ions present in one molecule of the base Equivalent mass of an oxidising agent (a) Electron concept: Equivalent mass of oxidising agent = ("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule") (b) Oxidation number concept: Equivalent mass of oxidising agent= ("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent") Equivalent weight of oxalic acid salt in following reaction is :( Atomic masses:O=16,C=12,K=39) H_(2)C_(2)O_(4)+Ca(OH)_(2) toCaC_(2)O_(4)+H_(2)O
A
90
B
45
C
64
D
128
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Equivalent Mass The eqivalent mass of a substance is defined as the number of parts by mass of it which combine with or displace 1.0078 parts by mass of hydrogen, 8 parts by mass of oxygen and 35.5 parts by mass of chlorine. The equivalent mass of a substance expressed in grams is called gram equivalent mass. The equivalent mass of a substance is not constant. It depends upon the reaction in which the substance is participating. A compound may have different equivalent mass in different chemical reactions and under different experimental conditions. (a) Equivalent mass of an acid It is the mass of an acid in grams which contains 1.0078 g of replaceable H^(+) ions or it is mass of acid which contains one mole of replaceable H^(+) ions. It may be calculated as : Equivalent mass of acid= ("Molecular mass of acid")/("Basicityof acid ") Basicity of acid = Number of replaceable hydrogen atoms present in one molecule of acid (b) Equivalent mass of a base It is the mass of the base which contains one mole of replaceable OH^(-) ions in molecules. Equivalent mass of base= ("Molecular mass of acid ")/("Acidity of acid") Acidity of base= Number of replaceable OH^(-) ions present in one molecule of the base Equivalent mass of an oxidising agent (a) Electron concept: Equivalent mass of oxidising agent = ("Molecular mass of oxidising agent")/("Number of electrons gained by one molecule") (b) Oxidation number concept: Equivalent mass of oxidising agent= ("Molecular mass of oxidising agent")/("Total change in oxidation number per molecule of oxidising agent") When NO_(2) is dissolved in water solution become acidic. Equivalent weight of NO_(2) in this reaction (NO_(2)+H_(2)O to HNO_(3)+HNO_(2)) is :
The equivalent mass of Fe in FeO is
What is the equivalent mass of MnO_2 in acidic medium?
Equivalent mass of an element is
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RESONANCE-EQUIVALENT CONCEPT & TITRATIONS-Exercise -2 (Part-IV)
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- Some amount of "20V" H(2)O(2) is mixed with excess of acidified soluti...
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- For KMnO(4) in strong basic medium correct combination is -
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- For KMnO(4) in neutral medium correct combination is -
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- For a disproportionation reaction the only correct combination is -
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