YTread Logo
YTread Logo

A Colorful Magic Trick with Acids and Bases

A Colorful Magic Trick with Acids and Bases
let me show you a

magic

trick

this might look like an ordinary kettle but it's a

magic

kettle and it's

magic

because it will pour any color that I asked it to oh you don't believe me check this out pink hey not that okay blue red okay how about green no no I mean yellow and okay and then green so there we go a rainbow of colors so I bet you're wondering how I did that well it's not

magic

but it is some pretty cool science my name is Tyler and I'm a student at MIT and
a colorful magic trick with acids and bases
I'm going to teach you the science behind this

magic

trick

and I'm going to show you how you can do it yourself at home but first we have to go to the lab and learn a little bit about some chemicals called

acids

and some chemicals called

bases

so let's go and check it out welcome my lab this is where I have all my chemicals that I use for these sides experiments that I do every day and I also brought a few of these chemicals here from home I also have a bunch of beakers here and I
filled the beakers with a liquid called indicator you can see that indicator this indicator I'm using has sort of a blue purplish color and that's going to be important indicator tells us whether a chemical is acid base or neutral let me show you what I mean I'm going to take a chemical here and add little drops of it to the indicator I want you to watch carefully for the color change because it's really cool it looks so cool so Chemical I'm going to stir this indicator as I
drop it in watch this see these drops make a very light purple and they make little pink bits when I when I drop them in and there's some pink and some more pink and it gets Pinker and Pinker the more I add and now it gets darker and darker and I eventually get a really deep bright red isn't that cool so if we can add a chemical to this indicator and it makes it redder and redder and redder like starts with purple and goes to pink and goes to red we call it an acid so this chemical here
is an acid let's take a look at another example here's a fresh beaker of indicator and again you can see that sort of starts at a at a blue very light purple color now I'm going to take this other chemical and I'm going to add it to the indicator let's see what happens now so few drops as I stir and you can see little bits of green in the indicator as I start dropping this in and now we go to a really nice blue color a very bright blue and then it becomes sort of aquamarine
here it's greener and greener now and now it turns the indicator green and I'll show you what happens if we add even more so look at what happens this gets more and more yellow until we have a yellow solution and its really bright cool yellow color so if we can add a chemical to an indicator and it makes it darker blue or that brighter blue that really nice blue and then greener and finally yellow if it can make any of those colors when we add it to the indicator we call it a base so
a colorful magic trick with acids and bases

acids

make it red pink and then red and

bases

make it blue and then green and then yellow if we add a whole lot of them okay let's look at another example I have a third chemical here I'm going to add some of it let's see what we get dropping it in here lots of drops and I'm not really seeing any change the color remains the same and as you'll see I can add as much of this as I want and the colors still going to stay this blue purplish color that's because this compound
this chemical we call it neutral it's not acid and it's not base so it doesn't change the color of the indicator we can add as much as we want and the indicator is just going to sit stay the same color so those are our three categories of chemicals

acids

bases

and then those that are neutral you can tell whether something is acid or base or neutral by the color that it makes an indicator now these color changes are really cool indicators are a lot of fun you may think that this
indicator is a fancy chemical that I only have in the lab but actually I made this indicator in the kitchen back in my house and you can do the same thing we're going to need some indicator for the

magic

trick

that we're figuring out and I'm going to show you how to make this kind of indicator back in your kitchen so let's go take a look at that okay so here we are in my kitchen and I want to show you how to make this acid-base indicator that we've been using so you can do
these color changes yourself and so you can do the

magic

trick

so I will say this is pretty easy but you're going to have to boil some water and use a stove so make sure you have an adult around to help you with that step here's the stuff you're going to need first of all you're going to need a red cabbage you should be able to find something like this at any supermarket and then you're going to need a pot to boil some water and then you're going to need a strainer and
that's it it's pretty simple so what you want to do is you want to take the pot and you want to fill it about halfway up with water and then you want to take the cabbage and start pulling off parts of its leaves and putting those in the pan and you want to fill it up until pretty much all the cabbage is covered with with water so this is a this is a pretty good amount right about here and then what you want to do is turn up the heat and boil the water let it boil for four or five minutes
a colorful magic trick with acids and bases
and then turn the heat off and let it sit for fifteen minutes ten to fifteen minutes and after you do that what you're going to see is the cabbage here is going to lose its color it's going to become almost white and you're going to end up with purple cavil cabbage juice all that dye all that purple dye that was in the cabbage leaves is going to come out into the water and then the final thing you need to do is you need to take this and using a strainer pour the juice off the top of
it into some sort of a glass and now you have your cabbage juice indicator all ready to go so now let's go and see what we can do with this indicator and then find out how we can do this

magic

trick

okay so now that you've made your cabbage juice you're all ready to start testing things around the house to see whether they're acid neutral or basic and see those cool color changes I have here next to me a few examples of things you can test around the house but really anything
that's a liquid or powder you should be able to test just check with your parents first to make sure that you don't use anything that's that's dangerous or toxic or anything so okay everything with them first but let's just do a quick example here let's say that you wanted to test a little bit of glass cleaner here you could spray just a little bit into the bottom of the glass and then add the indicator ooh and it turns a it turns a sort of blue green so we know that
it's a base or let's say that we wanted to test some hot sauce here add a little the hot sauce a couple drops in there and then all we've got to do is just add a little bit of the indicator when we get a nice a nice red sort of pinkish color so we know that this is an acid so now let's talk about the

magic

trick

so how did I do it well you might sort of have been figuring parts of it out I took my tea kettle here and I filled it with indicator and the indicator as you know
changes color depending on whether I add an acid or base so what I did was I took glasses like this and I added a little bit of acid or base into the very bottom I try to find clear liquids there were

acids

and

bases

so let's do an example here let's say that I wanted a red color what I do is I take a little bit of vinegar and I'd use vinegar because I know vinegar is an acid so it's going to give me a red color add a little bit of this into the bottom here now if you're
doing this

magic

trick

you'll be able to see the clear liquid in the bottom but trust me no one else will especially if you make sure they keep a little bit distance especially if you're using a clear glass a clear glass like this they won't be able to see it if you have it on a table so you say that they're empty or don't say anything at all and people will assume that they're empty and then go ahead and you take your tea kettle or your picture of indicator and you pour
it in and you'll get a nice red or a pink color okay so they're a whole wide range of colors you can get you can get reds and you can't get pinks and blues and purples and greens and what I want you to do is experiment to find out which of these chemicals in your house give you these different colors and then put a little bit of that chemical that gives you the color in the bottom and pour in the indicator for the get that color now you may find that different amounts of these
chemicals give you different colors so maybe a little bit of glass cleaner will give you a bright blue but a little bit more glass cleaner will give you a green so experiment with all these things there's one thing that I do want to tell you though you can get a really nice yellow color by using a little bit of bleach but bleach can be dangerous so make sure that you work with an adult if you're going to do this but a few drops of bleach in the bottom of a glass like this add some
indicator and it turns green and then it turns yellow and that's how I did that thing at the very beginning when it started off green and then it turned yellow so I hope you've enjoyed watching this video we learned a little bit about

acids

and

bases

we learned about indicators and we learned how to do this pretty cool

magic

trick

that now you can use to impress your friends and family