For Determining Carbonate in Soda Ash... Utilize primary Standard Na2CO3(FW = 105.99) and titrant 0.1 M HCl... with the reaction also use Bromocresol Green or Methyl Orange as indicators . What two other indicators can use aside from Bromocresol Green and Methyl Orange for the titration?

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Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.