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by Procheta Mallik

Introduction

Using given indicators 1) Litmus Papers 2) Bromothymol Blue, find the pH level of tap water, drinking water and given distilled water. Repeat by adding household acid like Lemon juice or Vinegar

    • Avoid drinking tap water or distilled water .

    • Do not ingest bromothymol blue

  1. Collect tap water in a bowl.
    • Collect tap water in a bowl.

    • Dip a blue litmus paper, red litmus paper and pH paper in it .

    • Take out the papers and see if there's a colour change.

    • Repeat the same steps with drinking water

    • Repeat the same steps with distilled water

    • Collect tap water in a bowl .

    • Mix 4-5 drops of given bromothymol blue to the tap water.

    • See if there's a colour change .

    • Repeat the same steps with drinking water

    • Repeat the same steps with distilled water

    • Take the tap water, which is mixed with a few drops of bromothymol blue in it .

    • Add vinegar/lemon juice to it .

    • Is there a colour change?

    • Repeat the same steps on drinking water mixed with bromothymol blue

    • Repeat the same steps on distilled water mixed with bromothymol blue

    • What colour changes does bromothymol blue indicate?

    • When blue litmus turns red, is the sample acidic or basic ?

    • When red litmus turns blue, is the sample acidic or basic ?

    • Use bromothymol blue and litmus papers to find out if daily-life materials are acidic or basic - e.g. banana, shampoo, nail polish etc.

      • You may look at this to try the above

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Vishal Bhatt

Member since: 04/26/2017

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