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Water Dilutes Blue Liquid
Age 15 · Science
Adding water to a blue solution spreads the same blue material through a larger volume. The colour becomes paler because the dissolved material is less concentrated.
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Age 15: open this week
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In the picture
- Tilted small flask of dark blue liquid: the starting solution before more water is added.
- Falling droplets: the blue liquid entering the larger flask.
- Large flask of pale blue liquid: the same blue material spread through more water.
- Empty small flask: all the dark blue liquid has moved into the large flask.
Examples
- A spoonful of cordial mixed into a tall glass of water.
- A drop of food colouring stirred into a bowl of water.
Key takeaways
- Adding water increases the total volume, so the dissolved material is spread out more.
- The total amount of dissolved material stays the same when only water is added.
Quiz: Water Dilutes Blue Liquid (Age 15)
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What happens to the dissolved material when water is added to a solution?
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If only water is added to a solution, what happens to the total amount of dissolved material?
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Why does a blue solution become paler when water is added?
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