To convert an amount from milligrams to milliequivalents, convert the amount given into millimoles by calculating the atomic weight and dividing it by the amount of the substance in milligrams. Then, multiply the amount in millimoles by the valence number to get the amount in milliequivalents.
Know MoreThe periodic table is used to determine the atomic weight of a given substance. For example, if you are asked to convert 300 milligrams of sulfate to milliequivalents, you would look at the atomic weight listed for each element and add the numbers together. The formula for sulfate is SO4^--, so the atomic weight is 32 + (16 * 4) = 96 grams per mole. Since the conversion rate for grams per mole to milligrams per millimole is 1:1, the atomic weight in milligrams per millimole is 96.
Divide the amount of the given substance by its atomic weight. For 300 milligrams of sulfate, the result is 300 milligrams divided by 96 milligrams per millimole equals 3.125 millimoles.
If the substance being converted is a cation or anion, multiply its amount in millimoles by the number of charges to determine the amount in milliequivalents. If there is no charge on the substance, the amount in millimoles is the milliequivalent. Sulfate is an anion with a -2 charge, so the final equation is 3.125 millimoles * 2 = 6.25 milliequivalents.
The number of milligrams in 1 cc varies according to the substance to be measured. The metric system uses milligrams to measure weight and cubic centimeters, also known as milliliters, to measure volume.
Full Answer >The number of milligrams in 1 teaspoon varies according to the density of the substance being measured. Milligrams are a unit of weight; the teaspoon is a unit of volume equivalent to 5 milliliters. These measurements are part of the modern metric system established by the International System of Units.
Full Answer >The atomic mass of the element concerned must be divided by the number of valence ions present in that element. The number of ions is calculated by multiplying the valence value of the element by the mass in milligrams of the element in question.
Full Answer >As grams are a unit of mass and milliliters are a unit of volume, you need to know the density of the substance you are measuring in milliliters in order to convert the measurement from milliliters to grams. In the case of water, 1 gram = 1 milliliter, so 15 milliliters of water = 15 grams.
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