What are the steps involved in performing a gravimetric analysis?

Prepare for the NCEA Level 3 Chemistry – Aqueous Chemistry (AS91393) Exam. Utilize flashcards and multiple choice questions with hints and explanations. Excel on your exam!

The correct choice outlines the comprehensive process of gravimetric analysis, which involves precise steps to ensure accurate measurement of the analyte's mass.

First, dissolving the sample is crucial as it allows the analyte of interest to be separated from any other components. Once in solution, the analyte can be selectively precipitated through a reagent that reacts specifically with it. Following precipitation, filtering and washing the precipitate is essential to remove impurities and ensure that only the desired product remains. The drying step that follows is critical as it eliminates any moisture that could skew mass measurements. Finally, calculating based on the mass of the dried precipitate allows for accurate quantification of the analyte, thus allowing the determination of its concentration or quantity in the original sample.

This method is extensively used because it relies on mass measurements, which are very precise when done correctly. The choice captures the sequential nature of the gravimetric analysis process, highlighting the importance of each step in producing reliable results.

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