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VIDEO

Definition of pH | Water, acids, and bases | Biology | Khan Academy

Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice.

Watch the next lesson: https://www.khanacademy.org/science/biology/water-acids-and-bases/acids-bases-and-ph/v/buffer-system?utm_source=YT&utm_medium=Desc&utm_campaign=biology

Missed the previous lesson? https://www.khanacademy.org/science/biology/water-acids-and-bases/acids-bases-and-ph/v/bronsted-lowry-definition-of-acids-and-bases?utm_source=YT&utm_medium=Desc&utm_campaign=biology

Biology on Khan Academy: Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascinating and intricate systems that make life possible. Dive in to learn more about the many branches of biology and why they are exciting and important. Covers topics seen in a high school or first-year college biology course.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy's Biology channel: https://www.youtube.com/channel/UC82qE46vcTn7lP4tK_RHhdg?sub_confirmation=1
Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy

VIEWS: 297,660
LIKES: 624
COMMENTS: 29
RATING:
MEMBER NOTES:

COMMENTS (29)


Is the bleach basic?

@Marion-sb1kr
2022-06-26T11:23:56Z

Negative sign in ph indicates what in ph=-log H+ ?

@dhairyamehta4505
2021-09-15T17:15:09Z

Again, another useless video.

@anacondaeunectes1854
2021-04-26T23:54:06Z

My biology teacher said that alkaline water is bs and they just make money. Doesn't make a difference. Just buy spring water. Is that true?

@TheLilia7x
2021-02-17T04:41:15Z

quick question if something is composed of more hydrogen = higher acidity and if something consist of more hydroxide = more base ?

@dudedude9528
2020-09-12T18:01:33Z

I could listen to this guy talking all day

@marcodubuisson4238
2020-05-19T19:31:51Z

How many times stronger is the hydrogen ion concentration of pH 4 solution as compared with a pH 9 solution

@paulettewie2355
2020-03-27T07:09:40Z

9:25 I need me a glass of that stomach juice

@rlyok7137
2019-10-04T14:29:19Z

did anyone just watch these khan academy vids and get a 750+?

@beastboy9472
2019-07-17T23:31:59Z

pH = protons of Hydrogen?

@yes.thatjanedoe
2019-04-26T02:20:18Z

So...life is about giving and recieving...lol..

@geneoluminology
2018-11-08T15:29:44Z

i wonder if 2 mechanisms of auto-ionizaion of water molecules in the very beginning of the video both exist or they are 2 different versions of the same mechanism?

@jeannnliao9406
2018-04-27T13:13:47Z

Im just wondering why we can assune that the base is log10? Is it just universal in chemistry or what?

@markusc90
2018-04-05T20:40:15Z

Soooo,is PH a good thing or a bad thing?

@soocute8370
2018-01-27T11:13:45Z

Beautiful explanation.

@henp99
2017-09-27T00:46:09Z

couldev shown how to solve it on the calculator..

@johnnyroe8053
2017-06-21T08:05:03Z

"I gotta have a litle bit orange juice, gotta have have little bit ORRRRRANGE JUICE. I gotta have my orange juice, gotta have my orange juice. Juice! Juice! Juice... I gotta have a little bit orange juice!" - Richard Feynman

@DonTLie38y
2016-10-04T19:49:29Z

The p in pH stands for "potenz", the German word for power.  No need to thank me just pay it forward.

@itssciencedude5893
2016-03-06T23:14:58Z

Há dublado para o português?

@joaomarcossouto205
2015-09-13T12:31:03Z

Next: THE ACTIVITY COEFFICIENT OF THE PROTON! ;)

@NemesisAnother
2015-07-05T17:23:48Z

View All Video Comments ( 29)
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