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Book 9, Question 5 · Video

Why Does Sugar Stop Dissolving If You Keep Adding It?

Video · 1:54 · Crafty Clover explains, from A Million Whys Book 9

Sugar stops dissolving because water can only hold so much of it! When the water is full, the extra sugar just sinks to the bottom. Warmer water can hold more, so it dissolves more

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why does sugar stop dissolving if you keep adding it?

The Big Idea

Sugar stops dissolving because water can only hold so much of it! When the water is full, the extra sugar just sinks to the bottom. Warmer water can hold more, so it dissolves more sugar.

Sugar Dissolves

Step one: sugar dissolves. Water molecules pull sugar crystals apart into tiny pieces, too small to see. That is why the sugar seems to disappear.

Water Gets Full

Step two: the water fills up. Each water molecule can only hold on to so many sugar pieces. When there is no room left, the water is saturated, and new sugar just sinks.

Warm Holds More

Step three: warm water can hold more. Warm water molecules move faster and pull sugar apart more easily. That is how cooks make thick syrups with lots of sugar.

A Closer Look

Let's take a closer look! First, you add a spoonful of sugar. Stirring spreads it out until it vanishes. After many spoonfuls, the water is full. Then the extra sugar sinks and stays on the bottom.

Quick Facts

Quick facts! At room temperature, water can hold about twice its weight in sugar. A full mixture is called a saturated solution. Rock candy grows from a very sugary water solution. Never taste hot drinks, and wait until they are only warm.

Think Like a Scientist

Now, think like a scientist! Fill a glass with room-temperature water. Stir in one spoonful of sugar at a time. Count how many spoons it takes before sugar stays on the bottom. Do not taste hot drinks, and wait until they are warm.

Outro

Dissolving has a limit, and it is called saturation. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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