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A Homemade pH Indicator Experiment Red Cabbage Juice (Red Cabbage pH Indicator)


welcome back to kids fun science my name
is Ken today’s the experiment is that homemade ph indicator red cabbage juice
experiment as always adult supervision is required what you need for this
experiment is cups cabbage sugar baking soda water bleach sprite sanitizer
vinegar knife and a blender and an adult’s to serve up this experiment
we’re going to cut in half and use half of a red cabbage once we cut it in half
we’re going to cut that red cabbage into strips the red cabbage contains a
natural pH indicator that changes colors according to the absolute iski of the
solution this is very easy to make and exhibit the wide range of colors
I like to cut out the white core though you can use it it doesn’t matter either
way and then once you get the white core out or leave it
cut that half into a quarter and then cut those into thin strips
you know just berries know how large you want to just cut thin strips all the way
through till you get them completely done
then take your thin strips and fill up your blender to its all the way to the
top you don’t want to compress it down so you’re just going to fill it up all
the way the top I ended up making two batches but I’m only showing you one
here so once you get that then I boiled some water and poured two cups of water
into here and then you kind of just pulse it so it mixes up the solution you
know breaks up the cabbage and makes it more into a liquid so once you get to
that point from there then you’re going to take a strainer and a coffee filter
and so you hit your coffee filter to put inside your strainer and then very
definitely pour slowly in so you don’t go over the outside of the coffee filter
because there’s more that there should be so keep going a little slow and pour
that until it goes all the way in and it will drink down like I said I need two
batches of this I’m only showing you one there’s two different ways to make the
pH indicator one like I’m doing with the blender and making it more into a liquid
the other way is not using a blender and just put in boiling hot water onto the
strips the difference only difference there is is we’re coming up with a dark
purple this way when we really blend it up when you don’t blend it up you get
more of a bluish dark blue pH indicator but they still work to say I prefer it
this way because you get more of a brighter color what we do our experiment
the red cabbage contains the pigment molecule called Alvin this water
Sullivan pigment is also found in apple skin plums poppies corn flowers and
grapes so here I go I’m going to start pouring in my pH red cabbage into the
different mixtures sprite first and then I go to bleach
next change a little bit there then I’m going to water straight water there and
then I go to baking soda solution I mixed about two tablespoons of baking
soda hand sanitizer two tablespoons and aunt
sizer water share your solution two tablespoons of sugar and stir to salute
their vinegar tray vinegar and lemon juice a little bit of water there you
can see a change in two colors move it around a little bit but the very
aesthetic solutions will turn a red color where neutral solutions result
more of a purplish color and basic solutions appear to be greenish or
yellow therefore it’s possible to determine the pH of the solution based
on the color occurrence from the pigments of the red cabbage juice do not
drink interview liquids at any point make sure you have an adult helping you
with this fun experiment here are the different color ranges put the pH and
the colors that goes with it and the different colors the way they go from
basic neutral and acidic I hope you enjoyed this video remember to click
thumbs up and to subscribe thanks for watching

18 thoughts on “A Homemade pH Indicator Experiment Red Cabbage Juice (Red Cabbage pH Indicator)

  1. Hey man, I am going to make a video on this experiment recently, is it ok if I link this video to mine? BTW, I am going to post it on my other channel that I do with my friend, it is actually my IB Chemistry Internal Assessment. My other channel's link is:https://www.youtube.com/channel/UCM8Nwe3jb7rxWMP_LvmaOhA Thank you for taking your time reading this!!

  2. Also, are there any ways I can contact you in person? Because I will need some help with the experiment and some other calculations based off of this experiment. Please email me if you see this! My email: [email protected]
    Thank you!!

  3. Great pH experiment Ken! I love to cook, and it was actually through cooking that I learned more about pH… so cool to learn how different foods interact and how different acid or base combinations impact a dish… didn't know cabbage juice was a natural pH indicator…

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