Identify the correct statements:A. Hydrated s | vedclass

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(B) primary standard is a reagent that is pure, stable, and has a high molar mass. Statement $A$ is incorrect because hydrated salts often lose or gai

Vedclass · Accepted Answer

$A, B$, and $C$ only

Vedclass · Answer

(B) primary standard is a reagent that is pure, stable, and has a high molar mass. Statement $A$ is incorrect because hydrated salts often lose or gain water of crystallization, making them unstable. Statement $B$ is correct; a primary standard must be stable and not react with air (e.g.,not hygroscopic or efflorescent). Statement $C$ is correct; the reaction must be rapid and follow a definite stoichiometry. Statement $D$ is incorrect; a primary standard must be readily soluble in water to prepare a standard solution. Statement $E$ is incorrect; a primary standard should have a high relative molar mass to minimize weighing errors. Therefore, only statement $B$ and $C$ are correct, but based on standard criteria, $B$ and $C$ are the most accurate. Given the options, $B$ is the best fit.

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