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What is a Solute?
Grade Level:
Class 7
Space Technology, EVs, Climate Change, Biotechnology, HealthTech, Robotics, Chemistry, Physics
Definition
What is it?
A solute is a substance that dissolves in another substance to form a solution. Think of it as the 'thing' that gets mixed into a liquid and disappears. It is usually present in a smaller amount than the substance it dissolves in.
Simple Example
Quick Example
Imagine you are making a glass of nimbu pani (lemonade). You take a spoon of sugar and put it into the water. The sugar is the solute because it dissolves in the water. The water is the liquid that dissolves the sugar.
Worked Example
Step-by-Step
Let's say you want to make a salt solution for a science experiment.
---Step 1: Get a glass of water (this will be the 'dissolver').
---Step 2: Take one teaspoon of common salt (this is the 'thing to be dissolved').
---Step 3: Add the salt to the water.
---Step 4: Stir the mixture well until the salt disappears completely into the water.
---Answer: In this example, the salt is the solute because it dissolved in the water.
Why It Matters
Understanding solutes is crucial in fields like Biotechnology, where scientists prepare solutions for medicines, and in HealthTech, for making intravenous fluids. Chemists and pharmacists use this concept daily to create new materials and drugs, impacting our health and environment.
Common Mistakes
MISTAKE: Thinking the solute is always a solid. | CORRECTION: Solutes can be solids (like sugar), liquids (like alcohol in water), or even gases (like carbon dioxide in soda).
MISTAKE: Confusing the solute with the solvent. | CORRECTION: The solute is the substance that dissolves, while the solvent is the substance that does the dissolving (usually present in a larger amount).
MISTAKE: Believing that if something doesn't dissolve, it's not a solute. | CORRECTION: A substance is a solute if it *can* dissolve. If it doesn't dissolve in a particular liquid, it means that liquid is not a suitable solvent for it, or it's insoluble.
Practice Questions
Try It Yourself
QUESTION: When you make chai, which ingredient acts as the solute? (Assume you add sugar and milk to water and tea leaves). | ANSWER: Sugar (and milk, if you consider it dissolving in the water-tea mixture).
QUESTION: If you put a stone in water, does the stone act as a solute? Why or why not? | ANSWER: No, the stone does not act as a solute because it does not dissolve in water.
QUESTION: You are making a solution by mixing 20g of salt and 100g of water. Which substance is the solute and which is the solvent? Explain your reasoning. | ANSWER: Salt is the solute because it is present in a smaller amount (20g) and dissolves in the water. Water is the solvent because it is present in a larger amount (100g) and dissolves the salt.
MCQ
Quick Quiz
Which of the following is a solute when making a glass of orange juice from concentrate and water?
Water
Glass
Orange juice concentrate
Spoon
The Correct Answer Is:
C
The orange juice concentrate is the substance that dissolves in the water to form the juice, making it the solute. Water is the solvent.
Real World Connection
In the Real World
Every time you drink a soft drink like Thums Up or Sprite, you're consuming a solution where carbon dioxide gas is the solute, dissolved in water under pressure. This is a common application of solutes in the food and beverage industry in India.
Key Vocabulary
Key Terms
SOLUTION: A uniform mixture formed when a solute dissolves in a solvent | SOLVENT: The substance that dissolves the solute, usually present in a larger amount | DISSOLVE: To mix completely with a liquid to form a solution | MIXTURE: A substance containing two or more different substances that are not chemically bonded
What's Next
What to Learn Next
Great job understanding solutes! Next, you should learn about 'What is a Solvent?' and then 'What is a Solution?'. These concepts are like best friends; they always go together and will help you understand how different substances mix in our world.
