[Verse 1]
In nineteen-oh-nine a quiet Dane named Søren
Sat in Copenhagen, counting ions in a jar
He caught the hydrogen crowd and gave them order
Stretched a number line from nothing up to far
Zero to fourteen, that's the ladder he was drawing
Acids pile up low, bases claim the height
Seven sits alone, the calm unshaken middle
Plain water balanced, neither sour nor bright
[Chorus]
H plus is the acid's calling card
OH minus the base's counterpart
Zero's sharp, fourteen's slick as glass
Seven's the quiet one right in the middle class
Pink for sour, green for the bitter brew
Cabbage juice tattles on the chemicals too
Learn the scale and you'll never be lost
Sørensen's ladder, counting every cost
[Verse 2]
Boil a red cabbage down to purple liquor
Dip a strip of paper, watch the color run
Squeeze in lemon juice, it blushes rose and rosy
Baking soda stirred turns it jungle-green, undone
Old-school litmus plays the same two-color trick
Blue turns red when sour things arrive
Red turns back to blue when bases come to visit
This rainbow test keeps chemistry alive
[Chorus]
H plus is the acid's calling card
OH minus the base's counterpart
Zero's sharp, fourteen's slick as glass
Seven's the quiet one right in the middle class
Pink for sour, green for the bitter brew
Cabbage juice tattles on the chemicals too
Learn the scale and you'll never be lost
Sørensen's ladder, counting every cost
[Verse 3]
Your stomach brews an acid fit for welding
Hydrochloric fire to melt the bread you chewed
Too much climbs up burning past your collarbone
That midnight ache arrives uninvited, rude
Chew a chalky tablet, calcium carbonate rising
It meets the acid like two rivals shaking hands
Acid plus base equals salt and water quiet
Neutralized and settled, heartburn's final stand
[Bridge]
Now respect the edges, they are not for playing
Concentrated sulfuric drinks the water out of sugar whole
Leaves a hissing, steaming, blackened carbon serpent
Climbing from the beaker like a smoking coal
Drain cleaner hides sodium hydroxide, slippery and silent
A base so sharp it strips the oil from skin
Both ends of the ladder bite if you forget them
Gloves and goggles, let the caution win
[Verse 4]
Count the swaps that chemistry performs each morning
Most of them are acid meeting base somewhere
Ions trade their partners like a dance at closing
Salt falls quiet, water rises in the air
From kitchen sink to lab bench this same pattern echoes
Double-swap reactions, humble and precise
A single rule explaining half the changes
Sourness meets bitterness and settles in a trice
[Chorus]
H plus is the acid's calling card
OH minus the base's counterpart
Zero's sharp, fourteen's slick as glass
Seven's the quiet one right in the middle class
Pink for sour, green for the bitter brew
Cabbage juice tattles on the chemicals too
Learn the scale and you'll never be lost
Sørensen's ladder, counting every cost