According to the UCLA Department of Chemistry and Biochemistry, the equivalent weight is the weight required to provide the equivalent of one proton or one hydroxide anion. You can calculate this in a few minutes using a formula and some information about the molecule in question. You need the molecular formula and a copy of the periodic table for this calculation. The following method shows how to calculate the theoretical equivalent weight.
Know MoreLocate this number under the atomic symbol on the periodic table. For example, carbon, with the atomic symbol C, has an atomic weight of 12.011 grams per mole.
Multiply the atomic weight by the element's subscript in the molecular formula and add. In hydrates, multiply the weight of the water molecule by the number located between the dot and the H2O and add to the total.
Divide the molecular weight by the number of hydrogen protons it donates as acid or the number of hydroxide (OH)- anions it produces as a base. Use the units of grams per equivalent of H+ or grams per equivalent of (OH)-, depending on the ion species the molecule donates to the reaction.
To calculate the percentage between two numbers, determine the type of percentage needed. Then, subtract one number from the other, and divide it based on the type of percentage. Finally, multiply the answer by 100 to find the percentage.
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Full Answer >To calculate the area of a structure or section of land mass in square miles, use the formula for area of the section's shape with the dimensions, such as length, width, and radius, in miles. Not all sections of land or buildings have a simple shape, in which case the section should be divided up into simple shapes as well as possible to get an exact answer or a good estimate.
Full Answer >To calculate input/output tables, also known as function tables, first determine the rule. Use the rule to complete the table, and then write down the rule. You need a pencil and paper, and it takes about 10 minutes to complete the exercise.
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