2.30: Describe the Use of Universal Indicator to Measure the Approximate pH Value of an Aqueous Solution

UNIVERSAL INDICATOR: Solution or paper indicator that changes into a range of colours to specifically identify pH of solution

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USE OF UNIVERSAL INDICATOR TO MEASURE pH OF AQUEOUS SOLUTION:

• If using universal indicator solution, a few drops of this indicator solution is added to the Aqueous Solution and colour change is observed and matched to specific colour on pH scale (to identify pH)
• If using universal indicator paper, this paper is dipped into Aqueous Solution and colour change is observed and matched to specific colour on pH Scale (to identify pH)

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UNIVERSAL INDICATOR AND pH SCALE:

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Colour change of universal indicator is matched to a specific colour on pH Scale, identifying approximate pH

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