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Chemistry

GCSE · AQA

QuestionsFlashcards

Simple Model of the Atom
The Periodic Table
Properties of Transition Metals
- Typical Properties of Transition Metals
  7
- Transition Metals vs. Alkali Metals
  6

Ionic, Covalent & Metallic Bond
Bonding & Substance Properties
Structure & Bonding of Carbon
Bulk & Surface Properties
- Sizes of Particles & their Properties
  6
- Nanoparticles
  6

Formation of Earth's Atmosphere
CO2 & CH4 as Greenhouse Gases
Causes of Atmospheric Pollution
- Atmospheric Pollutants from Fuels
  6
- Properties & Effects of Atmospheric Pollutants
  6

Global Reserves & Potable Water
Life Cycle Analysis & Recycling
- Life Cycle Assessment
  7
- Reducing Use of Resources
  5
Using Materials
Haber Process & NPK Fertilisers

The pH Scale & Neutralisation Flashcards

All 7 cards in this deck

Which ion do acids produce in aqueous solution?: Hydrogen ions, $\mathrm{H^+}$ .
Which ion is present in aqueous solutions of alkalis?: Hydroxide ions, $\mathrm{OH^-}$ .
Write the ionic equation for the neutralisation of an acid by an alkali.: $\mathrm{H^+ + OH^- \rightarrow H_2O}$
What does the pH scale measure, and what do pH 7, below 7 and above 7 mean?: Acidity or alkalinity, from 0 to 14: pH 7 is neutral, below 7 is acidic, above 7 is alkaline.
What two methods can be used to measure the pH of a solution?: Universal indicator (or a wide range indicator) for an approximate pH, or a pH probe/meter for an accurate value.
What colour is universal indicator in a strongly acidic, a neutral and an alkaline solution?: Red in strongly acidic, green in neutral, blue/purple in alkaline solution.
True or false? Diluting a strong acid with water can raise its pH above 7.: False. Adding water lowers the hydrogen ion concentration so the pH increases towards 7, but the solution stays acidic.