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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.
Since 24 grams of magnesium is equal to 2 grams of hydrogen, the equivalent weight of magnesium is 12. NaOH + HCl → NaCl + H 2 O According to the above example the equivalent weight of HCl is 36.5.
In chemistry, equivalent weight (also known as gram equivalent[1] or equivalent mass) 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.
Q. 24 g of magnesium combines with oxygen forming 40 g of oxide. The equivalent weight of magnesium is:
The equivalent weight of the acid can be determined by determining the individual molecular weight of each of the elements from the periodic table and firstly adding them together. This will give us the molecular weight of the acid.
The equivalent weight of an element is calculated by dividing its gram atomic weight by its valence (combining power). Silver (Ag), 107.868 grams (g); magnesium (Mg), 24.312/2 g; aluminium (Al), 26.9815/3 g; and sulphur (S, in the form of a sulphide), 32.064/2 g are some comparable weights.
Example: Find the equivalent weight of for its oxide formation. Answer: From the above equation we can say, 16 grams of oxygen combined with 24 g of magnesium. 1 gram of oxygen combine with g of magnesium. 8 gram of oxygen combine with g of magnesium. Equivalent weight of magnesium = 12.
Equivalent weight can be defined as the mass of one equivalent of a given substance that will combine with or displace a fixed quantity of the other substance. It is represented by ‘E’ and is equal to the ratio of molecular weight and the valency factor.
The equivalent weight of calcium carbonate (CaCO 3) is 50.045, as calculated above. One equivalent of CaCO 3 is therefore 50.045 grams of CaCO 3 . A milliequivalent is similar to an equivalent except the chemical is measured in milligrams instead of grams.
Magnesium is the 12th element in the periodic table and has a symbol of Mg and atomic number of 12. It has an atomic weight of 24.305 and a mass number of 24. Magnesium has twelve protons and twelve neutrons in its nucleus, and twelve electrons in three shells.