a student has 100 cm of acid she adds a few drops of Litmus indicator the student then as 50cm of an alkaline solution and of the same concentration as the acid describe the colour changes he would observe and explain your answer .
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Explanation:
pH is measured using indicator solution by putting a few drops of universal indicator to dilute HCl when the color appears is red. This is compared with pH chart colour which indicates that HCl is a strong acid with pH less than 7.
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