Definition of equivalent weight : the mass of a substance especially in grams that combines with or is chemically equivalent to eight grams of oxygen or one gram of hydrogen : the atomic or molecular weight divided by the valence.
What is molecular weight and equivalent weight?
Molecular weight is the total atomic mass of a molecule for a compound. Equivalent weight, on the other hand, is the portion of the compound’s molecular weight associated with each valence electron. For a compound, equivalent weight takes the molecular weight and divides it by the net positive valence.
What is equivalent weight in chemistry class 11?
The amount of substances that completely react with each other in the reaction is called equivalent weight in chemistry. Equivalent weight = molecular weight / X.
What is equivalent weight in titration?
The equivalent weight of an acid is the mass of acid required to generate one mole of hydrogen (hydronium) ion in aqueous solution. For an acid like HCl, which has only one ionizable hydrogen, the equivalent weight is the same as the molar mass.
What is normality and equivalent weight?
Normality is the number of equivalent weights, EW, per unit volume. An equivalent weight is the ratio of a chemical species’ formula weight, FW, to the number of its equivalents, n.
What is the unit of equivalent weight?
The unit of equivalent weight is the atomic mass unit; the amount of a substance in grams numerically equal to the equivalent weight is called a gram equivalent. Hydrogen has atomic weight 1.008 (rounded to three decimal places) and always assumes valence 1 in compounds, so its equivalent weight is 1.008.
What is equivalent formula?
The equivalent masses of acids, bases, and salts are calculated as follows: Equivalent mass of an acid = molecular mass of the acid/basicity. Equivalent mass of a base = molecular mass of the base/acidity. Equivalent mass of a salt = molecular mass of the salt/total positive valency of metal atoms.
What are equivalents in chemistry?
An equivalent (symbol: officially equiv; unofficially but often Eq) is the amount of a substance that reacts with (or is equivalent to) an arbitrary amount (typically one mole) of another substance in a given chemical reaction.
What is the equivalent weight of CO2?
One CO2 molecule is reacting with 2 hydroxyl ions. Thus n-factor is 2 and its equivalent weight is 44/2 = 22g/mole.
What is difference between equivalent weight and gram equivalent?
The key difference between gram equivalent and equivalent weight is that gram equivalent describes that the mass of one equivalent is given in the unit of gram whereas equivalent weight describes the mass of one equivalent in any unit of measurement.
What is equivalent weight Byjus?
Equivalent weight is the mass of one equivalent of a substance. It is also known as gram equivalent. The equivalent of any substance is given by the charge it carries on itself. Thus, the equivalent weight is obtained by the ratio of the molar mass of the substance and the number of equivalents.
What is equivalent mass formula?
The formula to calculate the equivalent mass of an element is given by. Equivalent Mass = Atomic Mass Valency .
What is equivalent weight of NaCl?
The equivalent weight of NaCl is 58.5/1 or 58.5.
How do you find the equivalent weight of NaOH?
To begin, we must determine the molecular weight of sodium hydroxide (NaOH). Sodium has a molecular weight of 23 g/mol, oxygen has a molecular weight of 16 g/mol, and hydrogen has a molecular weight of 1 g/mol. Now, the molecular weight of sodium hydroxide will be: Mol. wt = 23 + 16 + 1 = 40 g/mol.
How do you find the equivalent weight from a titration curve?
Why normality is used in titration?
It is mainly used as a measure of reactive species in a solution and during titration reactions or particularly in situations involving acid-base chemistry. As per the standard definition, normality is described as the number of gram or mole equivalents of solute present in one litre of a solution.
What is unit of normality?
Key Takeaways. Normality is a unit of concentration of a chemical solution expressed as gram equivalent weight of solute per liter of solution. A defined equivalence factor must be used to express concentration. Common units of normality include N, eq/L, or meq/L.
Why do we use normality?
For the continuous data, test of the normality is an important step for deciding the measures of central tendency and statistical methods for data analysis. When our data follow normal distribution, parametric tests otherwise nonparametric methods are used to compare the groups.
What is equivalent weight example?
The equivalent weight of an element is the mass which combines with or displaces 1.008 gram of hydrogen or 8.0 grams of oxygen or 35.5 grams of chlorine. These values correspond to the atomic weight divided by the usual valence; for oxygen as example that is 16.0 g / 2 = 8.0 g.
What does equivalent to mean?
equivalentverb. To make equivalent to; to equal. equivalentadjective. Similar or identical in value, meaning or effect; virtually equal.
What is the equivalent weight of water?
Explanation: Molecular weight of H 2 O is 18 grams. Its n-factor is 2. Its equivalent weight is 18/2= 9g.
What is an equivalent in organic chemistry?
Illustrated Glossary of Organic Chemistry – One equivalent. One equivalent: In reaction stoichiometry, the amount of one substance that reacts with one mole of another substance.
What is equivalent weight of h2so4?
Sulfuric acid has two hydrogen atoms that can be replaced. As a result, Sulphuric acid’s equivalent weight is 49u.
How do you find normality from equivalent weight?
What is a example for equivalent?
The definition of equivalent is something that is essentially the same or equal to something else. An example of equivalent is (2+2) and the number 4. Since 2+2= 4, these two things are equivalent. To make equivalent to; to equal.