This is a titration paper How do you optain accurate 1n 2 from the instructions

Question

ScanSolve AI Tutor · Accepted Answer

To obtain accurate titration results (referred to as "accurate 1n 2" which likely means "two accurate titrations"), follow these steps:

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.
Conduct subsequent titrations with greater precision.
Refill the burette. For these runs, add Solution A rapidly until you are about $1-2 \text{ cm}^3$ short of the approximate titre volume determined in Step 1.
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.
Record the initial and final burette readings for each titration to two decimal places (e.g., $0.05 \text{ cm}^3$ precision).
Calculate the titre volume for each run.
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., $\pm 0.1 \text{ cm}^3$ ).
These concordant values are your accurate titrations and should be recorded in the "Accurate" columns of the table.

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