Why Does Lemon Juice Keep Cut Apples From Browning?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why does lemon juice keep cut apples from browning?

The Big Idea

Lemon juice keeps cut apples from browning because it slows the browning chemistry! It is acidic, and it holds vitamin C, which soaks up oxygen first. That keeps the apple pale and fresh looking.

Cut Open

Step one: a cut meets the air. When a grown-up cuts an apple, oxygen from the air touches the inside. The apple also has an enzyme, which is a helper protein, waiting there to get busy.

Browning Starts

Step two: the enzyme goes to work. The enzyme uses oxygen to turn natural chemicals in the apple into brown pigments. That is called oxidation, and it is not the same as rotting.

Lemon Helps

Step three: lemon steps in. The acid slows the enzyme, and vitamin C soaks up oxygen before it can make brown color. The apple stays pale for longer, and still tastes tangy and fresh.

A Closer Look

Let's take a closer look! A cut apple opens up its cells. Oxygen from the air rushes in. Lemon juice slows the browning down. Without lemon, the apple turns brown.

Quick Facts

Quick facts! Browning is oxidation, not instant rot. Bananas, avocados, and potatoes brown the same way. Orange juice or pineapple juice can help a little too. A grown-up should do all the cutting, because knives are sharp.

Think Like a Scientist

Now, think like a scientist! With a grown-up slicing, brush lemon juice on half an apple slice. Leave the other half plain. Wait one hour and compare them. Check for allergies before you taste.

Outro

Lemon juice slows browning, so cut apples stay pale. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!