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Combined Science: Chemistry

GCSE · Edexcel · higher

QuestionsFlashcards

Group 1
- Group 1 (Alkali Metals)
  5
- Group 1: Reactivity & Electronic Configurations
  3
Group 7
Group 0

Hydrogen Ions & pH Flashcards

All 5 cards in this deck

What pH value does a neutral solution have, and what pH ranges are acidic and alkaline?: Neutral = pH 7; acidic = below 7; alkaline = above 7.
How does pH change as the concentration of hydrogen ions in a solution increases?: The pH decreases (gets lower).
If the hydrogen ion concentration decreases by a factor of 10, how does pH change?: The pH increases by 1.
What colour is litmus in acid and in alkali?: Red in acid, blue in alkali.
In an alkaline solution, how does the pH change as the concentration of hydroxide ions (OH⁻) increases?: The pH increases (the solution becomes more alkaline).