If you were standardizing a solution of NaOH like you did in a previous lab, which...

If you were standardizing a solution of NaOH like you did in a previous lab, which method of titration monitoring is better, do you think—using a pH probe to make a titration curve, or monitoring the end of the titration via an indicator color change? Why?

Expert Solution

Probing pH meter and to make a titration curve is better than using color change indicator. Because small change in hydrogen ion concentration can be accurately (depending upon sensitivity of pH meter) measured by pH meter, whereas slight color change cannot be always deted by all persons eyes equally, sometimes external source of light in the chemical laboratory will interfere with color of indicator to be shown as false negative. Some indicators works with specified pH region and shows color change only in that particular region, out of the region remains questionable. Today we are using highly accurate and most advanced precision balanced pH meter equipped with magnetic bar stirrer to make the titration solution evenly distributed (homogeneous), this helps us to make titration curve even better than manually swirling the titration solution during the color change indicator experiment.

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queen_honey_blossom answered 2 years ago

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