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Chemistry

GCSE · Edexcel

QuestionsFlashcards

Group 1
- Group 1 (Alkali Metals)
  6
- Group 1: Reactivity & Electronic Configurations
  6
Group 7
Group 0

Qualitative Analysis: Tests for Ions
Hydrocarbons
Polymers
Alcohols & Carboxylic Acids
Bulk & Surface Properties of Matter Including Nanoparticles
- Nanoparticles
  7
- Ceramics, Polymers, Composites & Metals
  5

Hydrogen Ions & pH Flashcards

All 5 cards in this deck

What is the pH of a neutral solution, and which pH values are acidic or alkaline?: Neutral is pH 7; acidic solutions have pH below 7, alkaline solutions above 7.
How does the concentration of hydrogen ions in an acidic solution affect its pH?: The higher the hydrogen ion concentration, the lower the pH.
How does the concentration of hydroxide ions in an alkaline solution affect its pH?: The higher the hydroxide ion concentration, the higher the pH.
What happens to the pH when the hydrogen ion concentration of a solution increases by a factor of 10?: The pH decreases by 1.
True or false? A solution of pH 2 has 100 times the hydrogen ion concentration of a solution of pH 4.: True. Each pH unit represents a tenfold change in hydrogen ion concentration.