Equivalent weight is defined as the number of parts by weight of any element that combine with or displace directly or indirectly, 1. Dec 26, 2019 as reductant hydrogen peroxide oxidises to oxygen. The equivalent weight of any substance is the mass of the substance in grams that combines with or is chemically equivalent to eight grams of oxygen or one gram of hydrogen. The mole ratio is two to one, hydrogen to oxygen, which reflects the actual composition. Oxides of nonmetallic elements are volatile compounds in which a covalent bond joins the oxygen and the nonmetal. That is, while element masses differ, when it comes to bonding with other atoms, the number of atoms, expressed in moles, is the determining factor in how much of a given element or compound will react with a given mass of another. The equivalent weight is equal to the atomic weight. Some elements exhibit more than one valence in forming compounds and thus have more than one equivalent weight. Mass of oxygen mass of oxidemass of element thus, answered jul 26 at 8. In other words, it is equal to the mass of the substance in grams that would react with or replace one gram of hydrogen. The concepts of equivalent weight and gram equivalents help link the.
The number of parts by weight of an element or compound which will combine with or replace, directly or indirectly, 1. In view of the coronavirus pandemic, we are making live classes and video classes completely free to prevent interruption in studies. The equivalent weight of an element is the mass which combines with or displaces 1. Equivalent weight definition and meaning collins english. Weight of metal oxide w2 grams 25 weight of metal w1 grams 20 solution. The weight of a substance that will combine with or replace one mole of hydrogen or onehalf mole of oxygen.
These values are the atomic weight divided by the usual valence. It is the simplest peroxide a compound with an oxygen oxygen single bond. You dont need the formula of the oxide to find this ratio, all you really to know here is the equivalent weight of the metal. Another example the sulfate radical so4 has formula weight 96. Equivalent weight we define the equivalent weight of a substance element or compound as. 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. Oxygen assumes a valence of 2 and has an atomic weight of 15. Each oxygen atom accepts two electrons to complete its octet. Equivalent weight article about equivalent weight by the. Calculate the equivalent weight of oxygen by oxide method through advanced online oxide calculator by putting the values of metal and metal oxide.
For an element the equivalent weight is the quantity that combines with or replaces 1. The element with an equivalent weight of 32 is sulfur. Equivalent weight of the oxygen can be determined by getting the metal and metal oxide. The equivalent weight of an element or radical is equal to its atomic weight or formula weithg divided by the valence it assumes in compounds. Equivalent weight definition of equivalent weight by.
The weight of a compound that contains one equivalent of a proton for acid or one equivalent of an hydroxide for base. The simplest definition of equivalent mass i can think of is the following. It is is the mass of a given substance which will combine with or displace a fixed quantity of another substance. Oxygen is the third most abundant chemical element in the universe, after hydrogen and helium. For so2, the equivalent weight of o2 is also 32, so the percent of oxygen by mass is. Equivalent mass or equivalent weight 1 pravendra tomar pt sir iitjee, neet. To the question, then, oxygen has an atomic weight of 15. For so2, the equivalent weight of o2 is also 32, so the percent of oxygen. Equivalent weight definition, the combining power, especially in grams gram equivalent, of an element or compound, equivalent to hydrogen as a standard of 1.
The molecular or molar mass of a substance is the mass of 6. How can we calculate equivalent weight of h2o2 askiitians. Apr 17, 20 the molecular weight of sio2 is 64 grams per mole and 32 grams of them is oxygen. Since oxygen has a molar mass of 16 grams per mole, while the molar mass of hydrogen is 1 gram per mole, the mass ratio is eight to one, oxygen to hydrogen. The equivalent weight of oxygen, when it is converted to. Equivalent weight is calculated by dividing the molecular weight by n factor. Equivalent weight definition 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 mass of a substance, in grams, that combines with or is chemically equivalent to, one gramatomic weight 1. Nov 03, 2017 the equivalent weight of any substance is the mass of the substance in grams that combines with or is chemically equivalent to eight grams of oxygen or one gram of hydrogen. Oxygen molecule gains four electrons to convert into its oxide ion.
To calculate a milliequivalent meq you have to have two pieces of information. The molecular weight of sio2 is 64 grams per mole and 32 grams of them is oxygen. Code to add this calci to your website just copy and paste the below code to your webpage where you want to display this calculator. Calculation of equivalent weight of reducing or oxidising agent ft. Some elements exhibit more than one valence in forming compounds and thus have more than one. To request a quote or for more information about air products, please fill out the form below.
For oxidationreduction reactions, one equivalent donates or. 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. More information on molar mass and molecular weight. Equivalent weight also known as gram equivalent is a term which has been used in several contexts in chemistry. For instance, calculate how many ounces, pounds, milligrams, grams, kilograms or tonnes of a selected substance in a liter, gallon, fluid ounce, cubic centimeter or in a cubic inch. If the equivalent mass is expressed in grams then it is called gram equivalent mass gem. What is the equivalent weight of mono atomic molecules. On the other hand, the equivalent weight concept is independent of coefficient of balanced chemical equation. Jun 11, 2015 the element with an equivalent weight of 32 is sulfur. Oxygen weight and volume equivalents weight of liquid or gas. When a known mass if element is changed into oxide directly or indirectly, the mass of oxide is noted. If we look at the defining ratio of equivalent weight of a compound ab formed of two radicals say a and b, then we can rearrange the ratio as. Equivalent weight definition of equivalent weight by the. This calculator estimates the equivalent weight by oxide method.
Oct 21, 2019 the cells in your muscles use oxygen to help create the energy needed to move your muscles. What is the meaning of equivalent weight and its formula. Materials, substances and compounds volume to weight conversions. Equivalent weight simple english wikipedia, the free. Equivalent mass of a substance is the number of parts by mass of the substance which combines with or displaces or contains 1. Equivalent weight dictionary definition equivalent weight. Certain fields of chemistry have continued to use the equivalent weight in limited contexts. The equivalent weight is equal to the atomic weight divided by the valence.
The mass of a compound which will combine with 8g of oxygen or 1g of hydrogen is said to be the equivalent weight of the compound. H2o2o2 the change in oxidation number is 2the molar mass 34ggram equivalent weight of h2o2 342 17g equivalent weight 152. How to find equivalent weight of oxygen careers360. Substances react with each other in stoichiometric, or chemically equivalent, proportions, and a. This generalized definition is used for the calculation of equivalent weight. If the equivalent weight of an element is 32, then what is. Nov 07, 2017 equivalent mass or equivalent weight 1 pravendra tomar pt sir iitjee, neet. Definition of equivalent weight also known as equivalent mass. Equivalent oxygen weight calculator chemistry calculators. What is gram equivalent weight of hydrogen peroxid. You must also be able to identify its valence from its molecular formula, as this determines ion number in solution. Meaning, pronunciation, translations and examples log in dictionary.
Hydrogen peroxide is a chemical compound with the formula h2o2. The number of parts by weight of it, that will combine with or displace directly or indirectly 1. In the example, the atomic weights of hydrogen h, sulfur s and oxygen o are 1. Oxygen has a molar weight of 16 gm so 1% oxygen per 100g is 62. Equivalent weight definition of equivalent weight at. In this paper, correlations between membrane composition equivalent weight and the mass transport properties i. To request a quote or for more information about air products, please fill out the form below, and an air products representative will contact you shortly. Now, the equivalent weight of oxygen in oxides is 8 g, so you know that the equivalent weight of the metal in this oxide is 3 xx 8 g 24 g this means that when this oxide is formed, every 24 g of metal will combine with 8 g of oxygen. Equivalent weight definition is the mass of a substance especially in grams that combines with or is chemically equivalent to eight grams of oxygen or one gram. The equivalent weight of metal is triple to that of oxygen. The unit of equivalent weight is the atomic mass unit.
The equivalent weight of an element or radical is equal to its atomic weight or formula weight divided by the valence it assumes in compounds. What is the equivalent weight of mono atomic molecules like o2. The mass of the substance in question and the molar mass or molecular weight of that substance. We define the equivalent weight of a substance element or compound as. Equivalent weight definition of equivalent weight by merriam. What is the equivalent weight of mono atomic molecules like. Jun 15, 2016 equivalent weight is defined as the number of parts by weight of any element that combine with or displace directly or indirectly, 1. Oxide refers to a binary compound of oxygen with a more electropositive element or group. What is the equivalent weight of the reactants in the. Mass of oxygen mass of oxidemass of element thus, eq massmass if element8mass of oxygen.
Calculate weight of oxygen per volume, it weighs 1. Equivalent weight in chemistry is also known as gram equivalent. In its most general usage, it is the mass of one equivalent, that is the mass of a given substance which will. Equivalent weight of the substance is defined as the weight of the substance that contains or reacts with 1. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight in atomic mass units of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all.