Describe a: (a) solvent as a substance that dissolves a solute (b) solute as a substance that is dissolved in a solvent (c) solution as a mixture of one or more solutes dissolved in a solvent (d) saturated solution as a solution containing the maximu

Experimental Techniques and Chemical Analysis – Experimental Design

Key Definitions

  • Solvent – The substance that dissolves a solute. Think of it as the “liquid playground” where the solute can spread out. 🌊

  • Solute – The substance that is dissolved in a solvent. It’s the “guest” that joins the playground. 💧

  • Solution – A homogeneous mixture of one or more solutes dissolved in a solvent. It’s like a smoothie where all ingredients are evenly blended. 🥤

  • Saturated Solution – A solution that contains the maximum concentration of a solute at a given temperature. If you try to add more solute, it will just sit on the bottom. ⚖️

  • Residue – The substance that remains after evaporation, distillation, filtration or similar processes. It’s the leftover “dust” after the main event. 🧹

  • Filtrate – The liquid or solution that has passed through a filter. It’s the clear water that comes out after the filter catches the solids. 🚰

Exam Tip Box

When answering definition questions, always include an analogy or example to show you understand the concept. For instance, describe a saturated solution as “a cup of tea that cannot hold any more sugar.” This demonstrates depth of understanding and can earn extra marks.

Quick Reference Table

TermDefinitionAnalogy / Example
SolventA substance that dissolves a solute.Water is the most common solvent – it’s like a friendly host.
SoluteA substance that is dissolved in a solvent.Salt in a glass of water – the salt is the solute.
SolutionA homogeneous mixture of solutes in a solvent.A clear lemonade – all ingredients are evenly distributed.
Saturated SolutionMaximum solute concentration at a given temperature.A cup of tea that cannot dissolve any more sugar.
ResidueWhat remains after evaporation, distillation, etc.The salt left after water evaporates from a salt solution.
FiltrateLiquid that passes through a filter.Clear water that comes out after filtering muddy water.

Exam Tip Box

When you’re asked to describe a term, start with the formal definition, then give an everyday example, and finish with a short analogy. This structure shows clarity and depth.

Common Mistakes to Avoid

  1. Mixing up solvent and solute – remember the solvent is the “host” and the solute is the “guest.”

  2. Forgetting that a solution is homogeneous – it looks the same throughout.

  3. Assuming a saturated solution can hold more solute – it cannot; any extra will stay as residue.

  4. Calling the liquid that passes through a filter a residue – it’s actually the filtrate.

Quick Flashcard

Q: What is the difference between a saturated solution and a residue?

A: A saturated solution contains the maximum amount of solute that can dissolve at a given temperature; any extra solute will remain as a residue after the solution is made.