This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
To obtain accurate titration results (referred to as "accurate 1n 2" which likely means "two accurate titrations"), follow these steps: Step 1: Perform an approximate titration. This initial run helps to estimate the volume of Solution A required to reach the endpoint. Add Solution A relatively quickly until the dark blue color just disappears. Record this volume in the "Approximate" column. Step 2: Conduct subsequent titrations with greater precision. Refill the burette. For these runs, add Solution A rapidly until you are about 1-2 cm^3 short of the approximate titre volume determined in Step 1. Step 3: Add Solution A dropwise as you approach the endpoint. Swirl the conical flask continuously. The endpoint is reached when the dark blue coloration (after adding starch) completely disappears, leaving a colorless solution. Step 4: Record the initial and final burette readings for each titration to two decimal places (e.g., 0.05 cm^3 precision). Calculate the titre volume for each run. Step 5: Repeat the precise titrations (Steps 2-4) until you obtain at least two consecutive titre values that are concordant, meaning they are within a very close range of each other (e.g., ± 0.1 cm^3). These concordant values are your accurate titrations and should be recorded in the "Accurate" columns of the table. Send me the next one 📸