The concentration of dilute sulfuric acid can be determined by titration with sodium hydroxide solution of known concentration. 25.00 cm3 of dilute sulfuric acid was measured out using a pipette and transferred to a conical flask. A few drops of methyl orange indicator were added to the acid in the conical flask. Sodium hydroxide solution was added to the acid from a burette until the indicator changed colour. The titration was repeated until two concordant results were obtained. The accurate result was the average of the two concordant results. Explain two details that could be added to this practical method to ensure an accurate result is obtained – 9037

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1. I would read the bottom of the meniscus on the burette at eye level to make sure the volume I record is accurate. I would also add the acid from the burette one drop at a time near the end point so I can see exactly when the colour changes.

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