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Howdy, kids! It’s Jeb-o-diah, the 

universal indicator! I’m here to tell y’all 

‘bout them colors a’ the pH rainbow.

Now potential for hydrogen means we gotta 

look real close at one of them acids, or 

their brothers, the bases, and I aint talkin 

baseball, neither.

So these acids have what we call a formula. 

Think of it like a secret code so your maw 

and paw don’t know what you’re sayin’.

Well when we look real close 

at their formula we see some 

special little chemical doohickeys.

Oh my...

When they has an H+, they’s an acid. When 

they has an OH-, they’s one a’ them bases.

But my job is tell scientists (I call ‘em 

nerds) how strong them chemicals are.

So them scientists want to know how 

strong a chemical is. Well, I just take a 

dive into that narsty slop, called a 

solution, and tell ‘em.

But it aint quite like that, see. We play a 

game. I turn a fun little color in the 

chemical and they says “Jeb-o-diah’s tellin’ 

us it’s a base.”

I change color cause I got my own 

formula too. ‘Cept I don’t use it 

‘gainst ma maw and paw (I love my 

folks).

My formula says what I’m shaped like real 

close. And when I see some a’ them acids 

or bases my shape changes a little.

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