What does gram equivalent mean?
Gram equivalent weight is 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.
How do you calculate equivalent weight?
The procedure to use the equivalent weight calculator is as follows:
- Enter the molecular weight, valency value, and x for the unknown in the input field
- Now click the button “Calculate x” to get the result
- Finally, the equivalent weight value will be displayed in the output field
What is the meaning of “equivalent weight” and its formula?
While answering the question what is equivalent weight? you should keep in mind that its definition depends on the two factors; the molar mass and valency factor of the compound. Equivalent Weight. Equivalent weight = molecular weight / X. In the above formula X represents the valency factor. For Acids 1. Sulphuric Acid (H 2 SO 4)
Does a Gram weigh more than a milligram?
If a centi is one hundred times smaller than the base unit then a meter is equal to 100 centimeters. And if a milli is 1000 times smaller than the base unit then a gram is equal to 1000 milligrams. The following common abbreviations are used in the metric system.
What is equivalent weight formula?
Equivalent Weight = Molecular weight/ Valency.
How is gram equivalent weight calculated?
Gram equivalent weight is equal to mass in grams numerically equal to Equivalent Weight. To calculate the Gram Equivalent Weight, we use the formula Eq = MW / n.
Is equivalent weight and gram equivalent the same?
We can define the equivalent weight of an element as the atomic weight divided by valence electrons in compounds. Its unit is atomic mass unit, the amount of substance in gram is equal to the equivalent weight known as the gram equivalent weight.
What is gram equivalent with example?
Definition: Gram equivalent mass of an element, compound or ion is the mass that combines or displaces 1.008 g hydrogen or 8 g oxygen or 35.5 g chlorine. Consider the following reaction: Zn+H2SO4 → ZnSO4+H2. In this reaction 1 mole of zinc (i.e. 65.38 g) displaces one mole of hydrogen molecule (2.016 g).
What is the meaning of 1 gram equivalent?
In chemistry, equivalent weight (also known as gram equivalent) is the mass of one equivalent, that is the mass of a given substance which will combine with or displace a fixed quantity of another substance.
What is equivalent formula?
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. It can be mathematically represented as. Equivalent weight = Molar Mass number of equivalents .
Why is equivalent weight used?
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 the gram equivalent weight of NaOH?
40g/molHence, the equivalent weight of NaOH is 40g/mol.
What is meant by equivalent weight?
equivalent weight, in chemistry, the quantity of a substance that exactly reacts with, or is equal to the combining value of, an arbitrarily fixed quantity of another substance in a particular reaction.
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 gram equivalent of HCl?
Therefore, the equivalent mass of HCl is 85.1g.
How do you calculate gram equivalent weight of caco3?
Multiply each element mass by the number of atoms of that element. The molecular weight of the calcium carbonate is 100.
How do you calculate gram equivalent weight of HCl?
1) The gram-equivalent weight of HCl is one mole of HCl (1.008 + 35.453 = 36.461 g).
What is equivalent weight?
Equivalent weight (also known as gram equivalent) is the mass of one equivalent, that is the mass of a given substance which will combine with or displace a fixed quantity of another substance.
How to find equivalent weight of a compound?
Additionally, the equivalent weight of a compound can be calculated by dividing the molecular mass by the number of positive or negative electrical charges that result from the dissolution of the compound.
How many grams of chlorine are equivalent to one gram of hydrogen?
Equivalent weights were not without problems of their own. For a start, the scale based on hydrogen was not particularly practical, as most elements do not react directly with hydrogen to form simple compounds. However, one gram of hydrogen reacts with 8 grams of oxygen to give water or with 35.5 grams of chlorine to give hydrogen chloride: hence 8 grams of oxygen and 35.5 grams of chlorine can be taken to be equivalent to one gram of hydrogen for the measurement of equivalent weights. This system can be extended further through different acids and bases.
How much hydrogen is equivalent to one gram of water?
However, one gram of hydrogen reacts with 8 grams of oxygen to give water or with 35.5 grams of chlorine to give hydrogen chloride: hence 8 grams of oxygen and 35.5 grams of chlorine can be taken to be equivalent to one gram of hydrogen for the measurement of equivalent weights.
What is equivalent weight in redox reactions?
For redox reactions, the equivalent weight of each reactant supplies or reacts with one mole of electrons (e −) in a redox reaction. Equivalent weight has the dimensions and units of mass, unlike atomic weight, which is dimensionless. Equivalent weights were originally determined by experiment, but (insofar as they are still used) …
What is the equivalent weight of a reactive polymer?
In polymer chemistry, the equivalent weight of a reactive polymer is the mass of polymer which has one equivalent of reactivity (often, the mass of polymer which corresponds to one mole of reactive side-chain groups).
When did equivalent weights start to be used?
The final death blow for the use of equivalent weights for the elements was Dmitri Mendeleev’s presentation of his periodic table in 1869, in which he related the chemical properties of the elements to the approximate order of their atomic weights. However, equivalent weights continued to be used for many compounds for another hundred years, particularly in analytical chemistry. Equivalent weights of common reagents could be tabulated, simplifying analytical calculations in the days before the widespread availability of electronic calculators: such tables were commonplace in textbooks of analytical chemistry.
How to calculate HCl equivalent weight?
For example, HCl molar mass is 36.5 g/mol and it contains 1 hydrogen atom (or can generate one H+ in solution). To calculate the HCl gram equivalent, divide 36.5 by 1 which is equal to 36.5 g. This means that 1 gram equivalent of HCl is equal to 36.5 g of HCl or 1 mole of HCl. This means that HCl equivalent weight is equal to mole of HCl.
How many atoms are in a gram of magnesium hydroxide?
For example, Magnesium hydroxide {Mg (OH)2} (Molar mass: 58.32 g/mol) contains two hydroxide atoms (or can generate two OH — in solution), therefore the gram equivalent is equal to 58.32/2 = 29.16. In terms of mole, the gram equivalent of Mg (OH)2 is equal to 0.5 mole.
How to calculate NaOH equivalent?
To calculate the NaOH gram equivalent, divide 40 by 1 which is equal to 40 g. This means that 1 gram equivalent of HCl is equal to 40 g of NaOH or 1 mole of NaOH. This means that NaOH equivalent weight is equal to mole of NaOH.
How much sugar is in a gram?
One gram is equal to 0.0353 ounces. A gram of sugar is approximately 1/4 teaspoon of sugar. A regular paper clip weighs about 1 gram.
How many ounces are in a gram of sugar?
By Staff Writer Last Updated March 31, 2020. Follow Us: One gram is one-thousandth of a kilogram. A kilogram is defined as the mass of a particular cylinder made out of iridium and platinum. This cylinder is kept in Sevres, France. One gram is equal to 0.0353 ounces. A gram of sugar is approximately 1/4 teaspoon of sugar.
What is Gram Equivalent?
Gram equivalent is the mass of an equivalent in the unit of grams. It describes the mass in grams of an element, group, or a compound. However, this term is different from the term equivalent weight based on the unit of measurement. This is because the mass can be measured in different units and an equivalent means any considered part of a material. Then the mass of that part is expressed in the unit of measurement for the mass of that particular material.
What is the Difference Between Gram Equivalent and Equivalent Weight?
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.
How to find equivalent weight of a compound?
In general chemical calculations, we can determine the equivalent weight by dividing the molar mass of the desired substance from the number of moles of hydrogen ions produced by this compound upon dissolution in water. For example, the molar mass of sulfuric acid is 98 g/mol. It produces two moles of hydrogen ions upon dissolution. Therefore, the equivalent weight is 98/2=49geq -1.
What is equivalent weight?
Equivalent weight refers to the mass of one equivalent of a material that is considered. It can be used with an element, a group of elements or a compound. Also, this term can be defined as the mass of a known substance that can combine or displace a fixed quantity of another substance. For example, the equivalent weight of an element is the mass which combines with or displaces 1.008 grams of hydrogen, 8.0 grams of oxygen or 35.5 grams of chlorine. These values are obtained by dividing the atomic mass from the most common valence value; e.g. equivalent weight with regard to oxygen is obtained by 16gmol -1 /2=8.0g.
What is equivalent weight in acid-base reaction?
However, for acid-base reactions, the equivalent weight refers to the mass that reacts with a mole of hydrogen ions. The unit of equivalent weight is the unit of mass. Therefore, this is not a dimensionless value. Most commonly, gram is the unit used to measure the equivalent weight. Originally, the value of the equivalent weight is determined …
What is equivalent of mole?
Mole concept is based on molecular weight. An equivalent concept is “gram equivalent weight” or “gram equivalent” concept. It is based on equivalent weight. Equivalent weight is measure of mass proportion of an element, compound or ion in which it combines with the mass of other chemical entities. Mass of one gram equivalent, like its mole counterpart, is equal to mass in gram, which is numerically equal to equivalent weight.
Is mass in grams equivalent to weight?
It is equal to mass in grams numerically equal to equivalent weight. If the mass of a chemical entity is “g” grams, then the given mass contains gram equivalents given by :
Overview
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Taking an example of sulfuric acid as follows:- H2SO4+ 2OH-→ 2H2O + SO42- The equivalent weight of the acid can be determined by determining the individual molecular weight of each of the elements from the periodic tableand firstly adding them together. This will give us the molec…
In history
Use in general chemistry
Use in volumetric analysis
Use in gravimetric analysis
In chemistry, equivalent weight (also known as gram equivalent ) is the mass of one equivalent, that is the mass of a given substance which will combine with or displace a fixed quantity of another substance. 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 …
Use in polymer chemistry
The first equivalent weights were published for acids and bases by Carl Friedrich Wenzel in 1777. A larger set of tables was prepared, possibly independently, by Jeremias Benjamin Richter, starting in 1792. However, neither Wenzel nor Richter had a single reference point for their tables, and so had to publish separate tables for each pair of acid and base.