In the chemical reaction represented by Na2CO3 + HC1 → NaHCO3 + NaCl, what is the equivalent weight of Na2CO3________________?
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Answer: C. 106
Explanation
Equivalent weight equals molecular weight divided by the n factor representing reactive capacity in a reaction. Sodium carbonate has a molecular weight of one hundred six grams per mole. In the given reaction sodium carbonate accepts one proton to form bicarbonate giving an n factor of one. Equivalent weight is a fundamental concept in volumetric analysis and acid base stoichiometry calculations. Molecular weight is calculated by summing standard atomic weights of constituent carbon sodium and oxygen atoms. Proton transfer reactions determine the effective reactive combining weight of basic carbonate compounds.
Fifty three represents the equivalent weight if sodium carbonate acted as a dibasic species with an n factor of two. Five point three and ten point six are decimal scaling errors that do not correspond to proper molecular mass. One hundred six is the molecular weight which equals the equivalent weight only when the reaction n factor is one.
- Subject
- Engineering
- Category
- Chemical Engineering
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- —
- Difficulty
- medium
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