Posted on 70 Comments

pH of 10 Common Household Liquids | Chemistry | acid or base | pH scale


Ever wonder whether your coffee is acidic or not? How about your tap water? We’re testing the pH of 10 Common Household Liquids using a digital pH meter.

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Socratica sends a big thank you to Rozway for sending us their digital pH meter to use in this video!
You can buy your very own Rozway pH meter from Amazon and test everything in your house like we did! Here’s a link:

We would also like to thank our generous Patreon Sponsor, Tracy Karin Prell, for her kind donation that helped us make this video!! Tracy, you have been such a positive influence on us! We’re so glad you are on the Socratica Team!
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Our first pH video is here:

Pure water is neutral, with a pH of 7, but most other water-based solutions are either acidic or basic. Some people are afraid of the word “acid,” thinking it means they are going to get burned. But the words “acid” and “base” merely tell you the direction a solution is moving away from neutral.

Acids increase the concentration of H+ ions in a solution.
Bases decrease the concentration of H+ ions in a solution.
If you’re concerned about safety, what you really want to know is the pH.
The pH scale runs from 0 to 14.
Acids have a pH less than 7.
Bases have a pH greater than 7.

The 10 Liquids we are testing today are:

Tap Water
Coffee
Glass Cleaner
Soda Pop
Moisturizer
Vinegar
Sriracha (hot sauce)
Shampoo
Milk
Lemon Juice

Now that you know the pH, can you calculate the H+ concentration? Post your answers in the comments!
We’d also like to hear if there are other common liquids you’d like us to test. If we get enough requests, we’ll make another video!

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What to Watch Next:
Calculating pH:
Stoichiometry part 1
Stoichiometry part 2:
What is a Mole? Avogadro’s Number:
Molar Mass:
Scientific Notation:
Significant Figures:
Unit Conversion 1:
Unit Conversion 2:

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We recommend the following books:

Brown and LeMay Chemistry: The Central Science
13th edition:
14th edition:

McGraw/Hill Chemistry by Chang & Goldsby

Uncle Tungsten: Memories of a Chemical Boyhood by Oliver Sacks

Napoleon’s Buttons: How 17 Molecules Changed History

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Written and Produced by Kimberly Hatch Harrison

About our instructor:
Kimberly Hatch Harrison received degrees in Biology and English Literature from Caltech before working in pharmaceuticals research, developing drugs for autoimmune disorders. She then continued her studies in Molecular Biology (focusing on Immunology and Neurobiology) at Princeton University, where she began teaching as a graduate student. Her success in teaching convinced her to leave the glamorous world of biology research and turn to teaching full-time. Kimberly taught AP Biology and Chemistry at an exclusive prep school for eight years. She is now the head writer and producer of Socratica Studios.

Products in this video:
Rozway Digital pH Meter + x6 FREE pH Buffer Powder Pack | BONUS KIT | Pocket Size Accurate pH Scale 0-14 Water Quality Test Aquarium Pool Soil pH Test Kit No pH Strips Premium Hydroponic Supplies Kit –

70 thoughts on “pH of 10 Common Household Liquids | Chemistry | acid or base | pH scale

  1. what could i fine with a very high ph ?? I have testing strips for finding the ph of things and I really want to make one into the purple!

    1. FUN!! Do you have any drain cleaner? Those are usually made with strong bases. Be very careful with this (we recommend using eye protection and wear gloves). Thanks for watching! 💜🦉

  2. My answer is banana

  3. i don’t agree with the abuse of lemons

  4. I feel you stole those lemons from my home and I quite frankly dont agree

  5. how many antelopes can you shove in the boot of a car

  6. i ate the lemon

  7. this helped me for my mid term thank you so much

    1. That makes us so happy to hear! Thank you for letting us know!! 💜🦉

  8. Isn’t it Los Angeles not los angeleeeees

    1. oh and btw im m.w

    2. Hi bilal… OMG i found u randomly

  9. Great job dear..u r the best tutor ever..vth luv from India..😍

  10. Great video! Would milk be a colloid rather than a suspension?

  11. How does one calibrate one of those ph meters? I don’t like using random chemicals if I plan to use the meter with foods. Anyway to force something to a very particular ph? Distill the hell out of water? Also are bases slippery because it pulls fats from our fingers?

  12. Nice ji

  13. Great video, I love the channel

    Well done

  14. Wah. Verry good video🌟🌟🌟🌟🌟 thanks,

  15. No entiendo XD

  16. thanks

    1. Hi..

  17. Great video, Thank you. You are the best, I haven’t seen a video this good for a long time! pH=-log[H+], (I will put it in English: the negative log of the hydrogen ion concentration). Did I answer your question? Or does one need to use something like the Henderson/Hasselbach equation? [inverse log or negative log]?

  18. Thank you so much.

  19. I didn’t want to to go to California Colorado where’s it at

  20. If you’d mix Potassium ferricyanide with one of those acids, would it liberate toxic gas ?

  21. hey i have a question if i post some pics in the discripion can someone tell me what they are they are chemical formlas i think i found them painted to a bridge near my house and cant figure out what they mean plz someone help

  22. Thanks for this great demonstration, it was helpful. Lemon and coffee showed similar acidic nature, not all acids have same outcome to our body, please share a video on which acids are good to consume and which are not. Waiting for your response.

  23. Sriracha is hardly spicy (try Sichuan food).

    1. hehehehe we have! Thought we were going to DIE.
      We might actually be dead now. It was shocking!
      This is the first Sichuan place we ever went to:

      Sadly it’s closed now…

  24. Is there a Asymmetry in the pH scale and if so which one has the overhand the acid or the base? (maybe there is also a link to Avogadro constant?)

  25. Great video. You deserve more views.

    1. You are so kind! Hopefully our audience will find us! If you could share with your friends (Twitter/Reddit, etc.) that would be a huge help.
      Thanks so much for watching and for your kind comment! 🙂

  26. Are bases considered alkaline? Thanks

    1. Yes! Good Question! Basic and alkaline are synonyms – they mean the same thing.
      Thanks for watching! 🙂

  27. Q: What did the lemon say to the window cleaner? A: Why you so basic though?

    1. @Frederick Amey Thank you, but I still don’t get the joke. (I’m dense that way).

    2. @Thomas Gronek The window cleaner is considered a base (basic) because it has less Hydrogen ions (H+) than water, the lemon is considered an acid (acidic) because it has more H+ ions than water…hence the joke

    3. Meg, Sorry , I don’t get it.

    4. Sheldon Senft window cleaner= alkaline. Alkaline=basic. Get it?

    5. It’s been a long day at school, but I’m sorry — I don’t get it. Oh, and by the way, we loved watching your video – well done!

  28. [H+] mol/l
    Tap water = 3.55 e-8
    Coffee = 8.51e-6
    Window Cleaner = 1.14e-10
    Soda = 1.34e-3
    Moisturizer = 5.75e-6
    Vinager = 5.37e-3
    Sriracha = 1.17e-4
    Shampoo = 7.94 e-7
    Milk = 2.63 e-7
    Lemons = 3.80 e-3

    1. i am grade 7 and i study acid and base
      so i do not know h+ concentration

  29. Thanks for the GREAT video !
    I felt like i have to test the pH levels of my stuff at home such as : Drinking water, Beauty products.
    thank you for providing the link to Amazon and Coupon code for Rozway digital pH Meter in the description of this Video

    1. We’re so glad you enjoyed it!
      We want to run around our house testing everything now. This little pH meter is great!! 🙂
      Thanks for watching. 🙂

  30. H=10^(-pH)

    1. Nicholas Williams: I think you won the prize, an H+ molecule. It’s in the mail (hahahaha)

  31. I actually remembered log rules.

  32. Good Video!! Very cool stuff.
    Every household has to get one of those

    1. I bet the whole family would learn a lot having one of these pH meters! Thanks for watching! 🙂

  33. what does it mean when an hcl solution has an h+ concentration of 10 power -8?

    1. @Daniel Șuteu but isn’t hcl an acid? My textbook gave a weird conclusion. Says the ph is 6.9 because an acid can’t have more than 7.

    2. It means that it is a base with a pH of 8.

  34. Great video! I would like to see more like this ☺

    1. We’re so glad you enjoyed it! Thanks for watching! 🙂

  35. Just a suggestion but if someone has, “a big gap” in their knowledge of chemistry, it might be a good idea to define what an H+ ion is. But otherwise, very cool video!

    1. hehehe…can’t teach them all of chemistry in one video! Maybe after this video, they can watch our more hard-hitting pH video with calculations – that one shows water auto-ionizing:
      Thanks for watching! 🙂

  36. nice idea for a video..science starts at home!

    1. Thanks Ben! Amazing what you can find out playing with a few tools at home! 🙂

  37. stop lighting the talent so darkly.

    1. Thanks for watching, and the feedback!

  38. Soda Pop was much more acid than I was expecting! Great video!

    1. Not only does the phosphoric acid play a BIG part, carbonic acid is also involved (not too much, I think a saturated solution yield a pH of about 5)

  39. this is fun, everything close to ph 7 is eatable? how can I get that meter?

    1. I wouldn’t eat something just because it was pH 7, no! 🙂 Probably lots of toxic things are close to pH 7.
      Rozway offered our viewers a discount on the pH meter! Here’s a link to Amazon and a discount code (good until the end of Feb 2017):

      Socratica sends a big thank you to Rozway for sending us their digital pH meter to use in this video! For a limited time, Rozway is offering 15% off Amazon’s list price on their pH meter to Socratica subscribers. Use this link to take advantage of this offer!
      Amazon link:
      Use group code: SOCRAT02 (valid until February 28, 2017)

    2. Lemon, vinegar, tomatoes, onions, garlic, strawberries… are not edible?

    3. ejecutor35 you can find the link for the Amazon listing in the videos description

    4. ejecutor35 do you drink shampoo? it is quite close to pH 7..

  40. The H+ concentration is the the number in the logarithm like this if im not mistaking:

    n=-log(10^-n) e.g. Soda Pop has the pH= 2,87

    2,87=-log(10^-2,87) , so the H+ concentration is 10^-2,87

    1. That is correct. In general: H⁺ = 10^(-pH).

  41. Good job. Thanks for sharing this.

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