Electrolytes, Ionisation, and Conductivity (Grade 10 NSC Matric Physical Sciences): Flashcards
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Definition of electrolyte
Definition of electrolyte
Substance with free ions that conducts electricity
Strong electrolytes
Strong electrolytes
Many ions; excellent conductors (e.g. NaCl, KBr)
Weak electrolytes
Weak electrolytes
Few ions; poor conductors of electricity
Non-electrolytes
Non-electrolytes
Don't conduct electricity; no ions in water
Examples of non-electrolytes
Examples of non-electrolytes
Sugar, alcohol, oil
How ion concentration affects conductivity
How ion concentration affects conductivity
Higher ion concentration = higher conductivity
How temperature affects conductivity
How temperature affects conductivity
Warmer solution = higher solubility & conductivity
Why solid NaCl doesn't conduct
Why solid NaCl doesn't conduct
Ions held tightly in lattice, not free to move
What happens when salts dissolve in water
What happens when salts dissolve in water
Dissociate into free-moving ions
Requirement for solution to conduct electricity
Requirement for solution to conduct electricity
Free-moving ions must be present