Huff and puff apparatus: Difference between revisions
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[[Image:Huff 'n'puff equipment.png|right|frame|Huff and Puff Apparatus respiration demonstration]] | [[Image:Huff 'n'puff equipment.png|right|frame|Huff and Puff Apparatus respiration demonstration]] | ||
The '''huff and puff apparatus''' is used in school [[biology]] and [[chemistry]] labs to demonstrate that [[carbon dioxide]] is a product of [[Respiration (physiology)|respiration]].<ref>{{cite book|url=https://books.google.com/books?id=z9bvAdZp97sC | The '''huff and puff apparatus''' is used in school [[biology]] and [[chemistry]] labs to demonstrate that [[carbon dioxide]] is a product of [[Respiration (physiology)|respiration]].<ref>{{cite book|url=https://books.google.com/books?id=z9bvAdZp97sC&dq=%22Huff+and+puff+apparatus%22+-wikipedia&pg=PA31|pages=31–32|title=Ascent!: Experiment B5: Comparing inhaled and exhaled air |first1=Louise |last1=Petheram|first2=Phil |last2=Routledge|first3=Lawrie |last3=Ryan|year=2003 |isbn=9780748767953|publisher=Nelson Thornes|access-date=June 11, 2025}}</ref><ref>{{cite book|url=https://llanidloeshighschool.co.uk/wp-content/uploads/WJEC-GCSE-Science-2018.pdf|page=14|title=Guidance for Teaching |year=2016|access-date=June 11, 2025}}</ref> | ||
A sample procedure is as follows: | A sample procedure is as follows: | ||
Latest revision as of 21:24, 6 July 2025
The huff and puff apparatus is used in school biology and chemistry labs to demonstrate that carbon dioxide is a product of respiration.[1][2]
A sample procedure is as follows: A pupil breathes in and out of the middle tube. The glass tubing is arranged in such a way that one flask bubbles as the pupils breathes in, the other as the pupil breathes out. A suitable carbon dioxide indicator, such as limewater, cabbage juice, or bicarbonate indicator shows the increased presence of carbon dioxide in the outgoing breath. This turns the limewater into milky white substance.