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 is equivalent weight in simple words?
: 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 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 called equivalent weight?
An equivalent weight which is also known as gram equivalent can be defined as is the mass of one equivalent, that is the mass of a given substance that will combine with or displace a fixed quantity of another substance.
What is equivalent weight write formula?
The equivalent weight of an element is its gram atomic weight divided by its valence (combining power). Some equivalent weights are: silver (Ag), 107.868 grams (g); magnesium (Mg), 24.312/2 g; aluminum (Al), 26.9815/3 g; and sulfur (S, in forming a sulfide), 32.064/2 g.
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. EW=FWn. The following simple relationship exists between normality, N, and molarity, M. N=n×M.
Why do we use equivalent weight?
Equivalent weight is defined as the mass of one equivalent of a given substance that will combine with or displace a fixed quantity of another substance. It’s useful in chemistry because it can be used to make chemically different molecules with different mass equal.
What is equivalent mean 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 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.
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 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 of solute?
EW is the equivalent weight in g/equivalent. It is calculated by dividing the molecular weight of solute by the number of equivalents per mole of solute (Equation 2). For acids, the number of equivalents per mole is the number of H+ ions contributed by the acid per mole of acid.
What is difference between equivalent weight and molecular weight?
The key difference between gram molecular weight and gram equivalent weight is that the term gram molecular weight refers to the mass of a molecule in grams, which is numerically equal to the molecular weight of that substance, whereas the term gram equivalent weight refers to the mass of one equivalent in grams.
What do you mean by equivalent weight and molecular weight?
In other words, it is equal to the mass of the substance in grams that would react with or replace one gram of hydrogen. Equivalent weight is expressed as the ratio of atomic weight or molecular weight to the valence.
What is 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 equivalent weight of acid?
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 the equivalent of caco3?
The equivalent weight of calcium carbonate (CaCO3) is 50.045, as calculated above.
What is equivalent weight of NaOH?
Hence, the equivalent weight of NaOH is 40g/mol.
What is n factor in normality?
n factor is atomic weight or molecular weight by equivalent weight. n factor for acids is its basicity,ie, no of replaceable hydrogen ion per molecule.
What is 0.1n solution?
So the equivalent weight of NaOH is 40. To make 1 N solution, dissolve 40.00 g of sodium hydroxide in water to make volume 1 liter. For a 0.1 N solution (used for wine analysis) 4.00 g of NaOH per liter is needed.
What is equivalent formula?
To calculate the equivalent mass of a base, simply divide the molar mass of the base by the number of hydroxyl groups. Take, for example, calcium hydroxide Ca(OH)₂. A few simple calculations yield an equivalent of 37g/mol. To find the equivalent of an acid, divide the acid’s molar mass by the number of protons.
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 does equivalent to mean?
/ɪˈkwɪv·ə·lənt/ equal to or having the same effect as something else: A mile is equivalent to about 1.6 kilometers. equivalent equations mathematics.
What is the equivalent weight of HCl?
Now equivalent mass is given as the molecular weight divided by the n-factor. Therefore, the equivalent mass of HCl is 85.1g.
What is the equivalent weight of h2so4?
Sulfuric acid has two hydrogen atoms that can be replaced. As a result, Sulphuric acid’s equivalent weight is 49u.