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What is a Concentrated Solution?
Grade Level:
Class 6
Space Technology, EVs, Climate Change, Biotechnology, HealthTech, Robotics, Chemistry, Physics
Definition
What is it?
A concentrated solution is a solution that has a large amount of solute dissolved in a small amount of solvent. Think of it as having a lot of 'flavour' or 'stuff' packed into a little liquid.
Simple Example
Quick Example
Imagine you are making lemonade. If you add a lot of lemon juice and sugar to a small glass of water, the lemonade will taste very strong and tangy. This strong-tasting lemonade is a concentrated solution.
Worked Example
Step-by-Step
Let's say you have two glasses of water.
---In Glass A, you add 1 spoon of salt to 100 ml of water.
---In Glass B, you add 5 spoons of salt to 100 ml of water.
---Both glasses have the same amount of water (solvent).
---Glass B has more salt (solute) dissolved in it compared to Glass A.
---Therefore, Glass B contains a more concentrated salt solution than Glass A. The salt taste would be much stronger in Glass B.
Why It Matters
Understanding concentrated solutions is important in fields like biotechnology, where scientists prepare concentrated medicines, or in environmental science, to measure pollutants in water. Chemists and pharmacists use this concept daily to create new materials and drugs.
Common Mistakes
MISTAKE: Thinking a concentrated solution means it has a lot of liquid. | CORRECTION: A concentrated solution means it has a lot of solute (the dissolved substance) in a relatively small amount of solvent (the liquid).
MISTAKE: Confusing concentrated with 'pure'. | CORRECTION: A concentrated solution is not necessarily pure; it just has a high amount of one substance dissolved in another. Purity refers to a single substance without any other mixtures.
MISTAKE: Believing that all concentrated solutions are dangerous. | CORRECTION: While some concentrated solutions (like strong acids) can be dangerous, others, like concentrated fruit juice, are perfectly safe and common.
Practice Questions
Try It Yourself
QUESTION: If you dissolve 10g of sugar in 50ml of water, and 5g of sugar in 50ml of water, which solution is more concentrated? | ANSWER: The solution with 10g of sugar in 50ml of water is more concentrated.
QUESTION: Your mother makes two cups of chai. Cup X has 2 spoons of tea leaves in 100ml of milk. Cup Y has 1 spoon of tea leaves in 100ml of milk. Which cup has a more concentrated tea solution? | ANSWER: Cup X has a more concentrated tea solution because it has more tea leaves (solute) in the same amount of milk (solvent).
QUESTION: You have 200ml of orange juice. You want to make it more concentrated without adding more juice. What could you do? | ANSWER: You could remove some of the water from the orange juice (e.g., by gently heating it to evaporate water), which would leave the same amount of orange solids in less liquid, making it more concentrated.
MCQ
Quick Quiz
Which of the following describes a concentrated solution?
A lot of solvent with a little solute
A lot of solute with a little solvent
Equal amounts of solute and solvent
No solute at all
The Correct Answer Is:
B
A concentrated solution means there's a large amount of the substance being dissolved (solute) compared to the liquid it's dissolved in (solvent). Options A, C, and D describe other types of solutions or non-solutions.
Real World Connection
In the Real World
Think about the concentrated syrups used in Indian street food stalls to make colourful drinks like 'goli soda' or 'sherbet'. A small amount of this concentrated syrup is mixed with water or soda to make a full drink. This saves space and makes transport easier for vendors.
Key Vocabulary
Key Terms
SOLUTE: The substance that dissolves in a liquid | SOLVENT: The liquid that dissolves another substance | SOLUTION: A mixture where one substance is dissolved evenly in another | CONCENTRATION: The amount of solute dissolved in a given amount of solvent
What's Next
What to Learn Next
Now that you understand concentrated solutions, you can explore 'Diluted Solutions' next! Learning about diluted solutions will help you understand how to make a strong solution weaker, which is also very useful in daily life and science.
