Introduction to pH | Biology foundations | High school biology

Introduction to pH | Biology foundations | High school biology | Khan Academy

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Күн бұрын

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The pH scale is used to determine the acidity or basicity (alkalinity) of a substance. Acidic substances have pH values below 7, while basic substances have pH values above 7; neutral substances have a pH of 7. The pH scale is logarithmic, so each step represents a 10-fold change in concentration.
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Пікірлер: 45

@jwyz26 6 жыл бұрын

Been using the pH scale for three years now in school with three separate teachers and not a single one managed to explain it the way you did in a five minute video. Thank you

@sashatoao8421 6 жыл бұрын

Sal. I wasn't even thinking about drinking acidic or basic stuff. Now I am.

@leaderlogic7004 6 жыл бұрын

Wow, this explanation was quicker and more informative than I remember from school! 😬 Awesome video!

@TheJoshtheboss 4 жыл бұрын

Is the scale counter intuitive or it's just me? The more hydrogen ion present (the higher the H content) the lower you go on the scale?

@lucasAA927 6 жыл бұрын

I already knew this, but the way you explained was amazing

@xLucky6 3 ай бұрын

Best explanation of the pH scale I've seen by far. Thank you Sal and all of Khan Academy for all of your excellent lessons!!!

@kingmuizz708 6 жыл бұрын

Nice video, informative

@StevenParo-u3m 13 күн бұрын

Good explanation ❤

@leaderlogic7004 6 жыл бұрын

😂 I've just found the Khan Academy Chemistry playlist = time to nerd!

@fuyu1 3 жыл бұрын

THE PH YESSIR

@yalalamyar4495 3 жыл бұрын

Great

@shivang5862 2 жыл бұрын

I have a doubt lemon does not damage my skin when I put it on bruh pls explain me .

@peterdunlop7691 6 жыл бұрын

I've never heard of, or remember from school, alkalines being called basic.

@keithroy7884 6 жыл бұрын

Peter Dunlop Yes, always were. I was head TA mixing chemicals for labs, after getting the highest score in several years of honors chemistry, just to let you know I do have some background.

@user-pp1bv7yr2n 4 жыл бұрын

@@keithroy7884 bruh the flex out of nowhere

@mantu73 6 жыл бұрын

please make video on how to find ph

@sciencenerd7639 2 жыл бұрын

Very nice

@user-bv8qw6vc6w 3 ай бұрын

Nice guy

@fificovfefe1030 3 жыл бұрын

Shouldn't you talk about pH being voltage...and the different voltages inside and outside the cells?

@NiAxY_ 4 жыл бұрын

nice by the way i

@jess3117 5 жыл бұрын

So no lemon juice ? D:

@janakakumara2648 Ай бұрын

Why blood ph is neutral

@abhayathreyahs3512 2 жыл бұрын

is battery acid sulfuric acid

@ABCD-ms6pr 6 жыл бұрын

What about drinking lemon water,does it alkaline your body?

@FatBitches 6 жыл бұрын

inabat meirambekova low concentration

@r.pvishnu657 6 жыл бұрын

Nothing happens.....

@munshibarkatali8928 2 жыл бұрын

Then why doesn't our stomach burst when we drink water as our stomach has acid and water reacts with acid and it's reaction is exothermic

@shivang5862 2 жыл бұрын

Stomach secretes acid as of what I know and it releases acid in small quantity and if water is added to acid then the reaction is not that exothermic may be there are other reasons to but how much I had study till now on that basis I told u and maybe MUCUS may play a role with acid 😁😁😁😁..... Hope it makes sense :-)

@pixelhy 7 күн бұрын

From what I know, the stomach doesn't always contain HCl, but only secretes it once food is inside the stomach. So it's not water added to acid, but acid added to water. But don't quote me on this, I could be wrong.