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1.2

Minor Versionm

by Suchitha Vishwa

Introduction

Make a hole in a plastic bottle cap and fix a bendable straw. Wrap given soda in a tissue paper and put it in the bottle with citric acid solution. Shake the bottle and point the straw to a burning flame.

Video Overview

    • Care should be take while doing the experiment

    • Use the scissors with care

    • Avoid contact with the citric acid

    • Do not ingest any of the materials

    • Use the lit candle under adult supervision

  1. Make a hole in the centre of the bottle cap using scissors, by first gently poking a hole and then rotating the scissor slowly to enlarge the hole The hole should be the same diameter as that of the straw Insert the straw in the hole, as shown
    • Make a hole in the centre of the bottle cap using scissors, by first gently poking a hole and then rotating the scissor slowly to enlarge the hole

    • The hole should be the same diameter as that of the straw

    • Insert the straw in the hole, as shown

    • Cut most of the straw below the bottle cap, as shown

  2. Take a plastic bottle . Pour 30 ml of  water into the plastic bottle. Transfer 3-4g of citric acid crystals into the plastic bottle.
    • Take a plastic bottle .

    • Pour 30 ml of water into the plastic bottle.

    • Transfer 3-4g of citric acid crystals into the plastic bottle.

  3. Pour  3-4g of baking soda onto the tissue paper . Spread out the baking soda. Fold the tissue in such a way that the baking soda does not fall out.
    • Pour 3-4g of baking soda onto the tissue paper .

    • Spread out the baking soda.

    • Fold the tissue in such a way that the baking soda does not fall out.

  4. Light a candle and keep everything ready to use . Put the tissue paper (containing baking soda) in the plastic bottle (containing citric acid). Immediately close the cap .
    • Light a candle and keep everything ready to use .

    • Put the tissue paper (containing baking soda) in the plastic bottle (containing citric acid).

    • Immediately close the cap .

  5. A colourless, odourless gas will come out from the mouth of the bent straw, and if pointed towards the candle, its flame will extinguish!
    • A colourless, odourless gas will come out from the mouth of the bent straw, and if pointed towards the candle, its flame will extinguish!

    • While the citric acid and baking soda are reacting, the bottle should be air tight .

    • Hole on the bottle cap should hold the straw tightly. If not, then glue can be used to make it air tight

    • Use washing soda instead of baking soda.

    • How many candles can you turn off by conducting this experiment once?

    • Why is the candle turning off? What gas do you think is released?

    • Write down, even in words, your guess at the chemical reaction.

    • Is the reaction endothermic (cooling) or exothermic (warming)?

Finish Line

Vishal Bhatt

Member since: 04/26/2017

2,725 Reputation

78 Guides authored

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