In this experiment , we were cleaned flasks and we marked 1,2,3 and 4. We added indicator and 20 mL of distilled water into the each flasks. We added NaOH from burette into the each flasks and we determined volume of NaOH for each flasks.When the color of solution change we closed the burette. We found the volume of spilled NaOH for each flasks and we reached the equilibrium.

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