5. determination of the strength of a given hcl solution by titrating it with standard naoh solution using conductometer
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HCl is a strong acid and NaOH is a strong base. Therefore, titrating one against the other yields a complete reaction. The titration is complete when the pH reaches 7.0. Methyl orange would not be appropriate here, as the color change occurs at between 3.1 and 4.4 in an aqueous solution. Not helpful in this case. A much better choice here would be phenolphthalein, which goes from clear to pink at a pH of 8.2 still not exactly 7.0, but well within the rapid transition point curve.
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