What is the equivalent weight definition in chemistry? The amount of substances that completely react with each other in the reaction is called equivalent weight in chemistry. While answering the question what is equivalent weight?
In the above formula X represents the valency factor. For acids, X valency factor is the basicity. Basicity- basicity is the number of hydrogen ions or hydronium ions released by an acid. In the case of sulphuric acid H 2 SO 4. The number of hydrogen ion released by sulphuric acid is 2. An emulsifying agent is a chemical compound that permits the mixing of two or more immiscible liquids. In addition to promoting the blending of dissimilar compounds, emulsifying agents are also responsible for keeping the mixture stable, i.
View Full Term. By clicking sign up, you agree to receive emails from Corrosionpedia and agree to our Terms of Use and Privacy Policy. 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.
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. Equivalent weight EW is an important parameter to understand the corrosion rate also called the mass loss rate of a metal when it undergoes the corrosion process.
Add a comment. Active Oldest Votes. Improve this answer. Chemist 2, 2 2 gold badges 19 19 silver badges 47 47 bronze badges. Li Zhi Li Zhi 31 1 1 bronze badge. Since 80g of Calcium reacts with 32g of oxygen, 20g of calcium should react with 8g of oxygen.
If that sounds complicated, this example should make it clear. Yashas Yashas 1, 5 5 gold badges 19 19 silver badges 39 39 bronze badges. You must decide which one to use depending on the situation. In case of redox reactions, equivalent weight is given by dividing molecular mass by the magnitude of change in oxidation state.
In fact Redox Reactions is a complete chapter by itself. I found a good link for you which has examples where equivalent weight is calculated on the basis of change in oxidation state. Click Click. Once you learn to calculate the N-factor, you can obtain the equivalent mass by dividing the molecular mass by N-factor.
BTW nice answer. Show 1 more comment. The equivalent weight is in simple terms the mass of one equivalent of a substance. Now let's see what we mean by one equivalent. The molar ratio of the reaction is Suppose we were to say that A and B react in the ratio of 1 equivalent to 1 equivalent. See more words from the same year. Accessed 11 Nov. More Definitions for equivalent weight. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Log in Sign Up. Save Word. Definition of equivalent weight. First Known Use of equivalent weight circa , in the meaning defined above.
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