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Answer :
Answer: To calculate the milliequivalent weight of calcium chloride (CaCl2.2H2O), we need to consider its molecular weight and valence.
The molecular weight of calcium chloride (CaCl2.2H2O) is given as 147 grams/mol.
The valence of calcium chloride is 2.
To calculate the milliequivalent weight, we divide the molar weight by the valence:
Milliequivalent weight = Molecular weight / Valence
Milliequivalent weight = 147 g/mol / 2
Milliequivalent weight = 73.5 g/mEq
Therefore, the milliequivalent weight of calcium chloride (CaCl2.2H2O) is 73.5 g/mEq.
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Final Answer:
The milliequivalent weight (MEW) of calcium chloride (CaCl2·2H2O), derived from its molecular weight of 147 grams and valence of 2, is 73.5 grams. Consequently, each milliequivalent (mEq) of calcium chloride corresponds to precisely 73.5 grams.
Explanation:
In chemistry, the milliequivalent weight (MEW) is a crucial parameter that indicates the quantity of a substance's ions participating in a chemical reaction. To compute the MEW of calcium chloride (CaCl2·2H2O), we employ the formula \( MEW = \frac{Molecular \,Weight}{Valence} \). For calcium chloride, with a molecular weight of 147 grams and a valence of 2, the MEW is calculated as follows:
\[ MEW = \frac{147 \,g}{2} = 73.5 \,g \]
This outcome signifies that each milliequivalent of calcium chloride is associated with 73.5 grams. This relationship is crucial in various applications, such as medical calculations and analytical chemistry, where precise measurements are essential. Examining the provided options, it becomes evident that "1 mEq represents 73.5 g of calcium chloride" aligns perfectly with our calculated MEW. Thus, the final answer affirms that, based on its molecular weight and valence, 1 mEq of calcium chloride indeed corresponds to 73.5 grams, reinforcing the significance of MEW in chemical calculations.
