# What Soda Really Boils Down To

Here's your nightly math! Just 5 quick minutes of number fun for kids and parents at home. Read a cool fun fact, followed by math riddles at different levels so everyone can jump in. Your kids will love you for it.

# What Soda Really Boils Down To

July 8, 2014

We all know that soda is loaded with sugar, rots people’s teeth and makes people fat if they drink too much. If that doesn’t sound gross enough, check out this video, where a guy cooks Coke on his stove to see what gunk is left behind once the water boils away. When we heat up water, it “evaporates:” it turns into steam and floats off into the air. But sugar and other ingredients don’t evaporate like that — they stay in the pot. So we see exactly how much of those things were mixed into the soda to make it. The “chef,” named Crazy Russian Hacker, first boils down a 1-liter bottle (close to 1 quart — about 4 cups), and there’s plenty of black goop left behind: a mix of sugar, food coloring and other chemicals. The 2-liter bottle leaves behind an even bigger, goopier load. It’s basically the syrup that Coke mixed into water to make the soda to begin with. But it’s a little alarming to see hat that goop looks like — and how much of it there is.

Wee ones: If you pour 2 bottles of Coke into a pot to boil it, then your friend adds 3 more bottles, how much Coke do you have for your science experiment?

Little kids: If you decide to boil 8 cups of Coke and right now 6 cups of liquid are left in the pot, how many cups of water have you boiled off?  Bonus: If you boil off half of the liquid you have left, how much liquid gunk will be left?

Big kids: The video shows the Coke boiling from about 1 minute 15 seconds until 1 minute 35 seconds. If it actually took him 5 times as long as that to boil it, how long did the boiling take?  Bonus: Crazy Russian Hacker ends up with about 1/2 cup of gunk. If half of that was sugar, how much sugar did the soda have?

The sky’s the limit: Once you boil off the water, you can just mix that sugary gunk into bubbly water to make soda all over again. If you boil all the water out of Coke and the gunk that’s left is 1/9 of the starting volume, then you add only ½ as much water back to make soda that’s twice as strong, how much soda did you boil to start if you end up with 15 cups?