Thymol blue is a unique indicator that has two set of color change, red to yellow near pH = 1.5 and yellow to blue near pH = 9.00. If a HCl-NaOH titration set-up used thymol blue as an indicator, what would be the color of the solution where the titrant and titrand are equimolar with each other?

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.