Difference between revisions of "Hydrogen Ion (Chemistry)"
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+ | :[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Hydrogen ions, pages 118-119, Gateway GCSE Chemistry, Oxford, OCR ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1782945679/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945679&linkCode=as2&tag=nrjc-21&linkId=a2db42f7b4bdf10cafaafa3bb9120940 ''Hydrogen ions, pages 43, 44, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR ''] |
Latest revision as of 15:00, 12 December 2019
Contents
Key Stage 4
Meaning
A Hydrogen ion (H+), sometimes called a proton, is a positive ion of Hydrogen found in acid solutions.
About Hydrogen Ions
Foundation
- When an acid compound dissolves in water it forms Hydrogen ions.
- Hydrogen ions are responsible for the corrosive properties of acids.
Higher
- As the pH of a solution decreases by 1 the Hydrogen ion concentration increases by a factor of 10.
Examples
Some acids are so strong that all of the Hydrogen ions become dissociated from the rest of the compound.
- HCl(aq) → H+(aq)+Cl-(aq)
In many acids not all of the molecules will lose their Hydrogen ions and this process can be reversed leaving them in a state of equilibrium:
- H2SO4(aq) ⇌ H+(aq)+HSO4-(aq)
- HNO3(aq) ⇌ H+(aq)+NO3-(aq)
- H2CO3(aq) ⇌ H+(aq)+HCO3-(aq)
- H3PO4(aq) ⇌ H+(aq)+H2PO4-(aq)
- CH3COOH(aq) ⇌ H+(aq)+CH3COO-(aq)
References
AQA
Edexcel
- Hydrogen ions, pages 118, 120, 122, 123, GCSE Chemistry, CGP, Edexcel
- Hydrogen ions, pages 43, 44, GCSE Chemistry; The Revision Guide, CGP, Edexcel