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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

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  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
    • 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

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    • Take a plastic bottle .

    • Pour 30 ml of water into the plastic bottle.

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

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    • 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.

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    • 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 .

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

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    • 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

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    • 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)?

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Finish Line

Vishal Bhatt

Member since: 04/26/2017

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50 Guides authored

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