Types Of Solutions | Ch:02 Matter | Class 9 Chemistry Federal Board NBF 2024

Federal Ka Manjan・2 minutes read

Kartar Kumar explains the concepts of solute and solvent using examples like salt and water, emphasizing the importance of correct quantity in determining solute and solvent. He also discusses solutions, physical states of solute and solvent, and the classification of solutions based on the amount of solute.

Insights

  • The quantity of a substance by mass determines whether it is a solute or solvent, not the number of moles, as clarified by Kartar Kumar, dispelling a common misunderstanding.
  • Solutions can be categorized based on the amount of solute present, with saturated solutions holding the maximum amount of solute at a specific temperature, while super saturated solutions are created by cooling a saturated solution until excess solute crystallizes out.

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Recent questions

  • What is the difference between solute and solvent?

    The solute is the lesser substance in a solution.

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Summary

00:00

Understanding Solutions: Solute, Solvent, and Classification

  • The speaker, Kartar Kumar, introduces himself and discusses the topic of solute and solvent using the example of salt and water.
  • He clarifies that the solvent is the substance with a greater quantity by mass, not the one with more moles, debunking a common misconception.
  • Kartar Kumar emphasizes the importance of correct quantity in determining solute and solvent, citing an international book as a reliable source.
  • He explains the concept of solutions in detail, mentioning examples like Pepsi with multiple components making up a solution.
  • The text delves into the physical states of solute and solvent, categorizing them into solid, liquid, and gas solutions.
  • Kartar Kumar discusses the formation of ammonia and its mixture with carbon dioxide for urea preparation, highlighting the importance of gas solutions.
  • The text touches on the use of hydrogen gas on nickel metal surfaces in the ghee industry and the amalgamation of metals in alloy industries.
  • The concept of catalysts is introduced, explaining their role in speeding up or slowing down reactions.
  • The text explores aqueous solutions, defining them as solutions where water is the solvent, with examples like sugar and salt in water.
  • Kartar Kumar explains the classification of solutions based on the amount of solute, distinguishing between saturated, unsaturated, and super saturated solutions.

17:21

"Understanding Solutions and Solubility in Chemistry"

  • To create a super saturated solution, start with a saturated solution at high temperature, then cool it until the solute crystallizes out, leaving behind a super saturated solution.
  • Concentrated solutions have a higher amount of solute compared to dilute solutions, with concentration increasing as the amount of solute increases.
  • Dilute solutions contain a relatively small amount of solute, while concentrated solutions have a larger amount of dissolved solute.
  • Solubility refers to the maximum amount of solute that can be dissolved in a solvent, with temperature affecting solubility - generally, solubility increases with increasing temperature.
  • The solubility curve shows how the amount of solute that can be dissolved changes with temperature, with gases showing a decrease in solubility as temperature increases.
  • Matter can exist in different forms, with allotropy referring to the existence of an element in various physical forms.
  • A solution is a homogeneous mixture of two or more components, with a saturated solution containing the maximum amount of solute at a given temperature.
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