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Chem 112, Cations and anions

by: Savannah Notetaker

Chem 112, Cations and anions CHEM 112

Marketplace > University of South Carolina > Chemistry > CHEM 112 > Chem 112 Cations and anions
Savannah Notetaker
GPA 3.2

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About this Document

these notes cover the cations and anions of weak acids and bases. This material will be on the next exam.
General Chemistry II
aaron vannucci
Class Notes
General Chemistry
25 ?




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This 2 page Class Notes was uploaded by Savannah Notetaker on Tuesday October 4, 2016. The Class Notes belongs to CHEM 112 at University of South Carolina taught by aaron vannucci in Fall 2016. Since its upload, it has received 5 views. For similar materials see General Chemistry II in Chemistry at University of South Carolina.


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Date Created: 10/04/16
Cations of weak bases are ACIDIC. They donate H to water making the weak + base and H O3which reduces the pH of the solution: NH 4+ (aq) .... + .... 2 O .... ---> ....NH 3aq) .... + .... H3O (aq) + Donates H weak base ACIDIC solution Cations of strong bases are NEUTRAL. They do not interact with water: Na (aq) .... + .... H2O .... ---> .... No Reaction Anions of weak acids are BASIC. They accept H from water making the weak - acid and OH which increases the pH of the solution: F (aq) .... + .... 2 O .... ---> .... HF(aq) .... + .... OH (aq) + Accepts H weak acid BASIC solution Anions of strong acids are NEUTRAL. They do not interact with water: Cl (aq) .... + .... H2O .... ---> .... No Reaction Most anions of polyprotic acids are BASIC, accepting H from water, although some act as acids and donate a proton to water. Cations of transition metal atoms are ACIDIC. In solution they are surrounded + by 4-6 water molecules. One of the water molecules breaks up, giving off H and making the solution acidic. Fe(H 2) 43+(aq) .... ---> ....Fe(H 2) 3OH) (aq) .... + .... H (aq) + Donates H ACIDIC solution ACIDIC CATIONSACIDIC ANIONS1. Cations of WEAK BasesSome anions of + - - - polyprotic acidsNH 4 (main example in General Chemistry)HSO , H PO , HSO 4 2 4 3 3+ 2. Some Metal cationsAl , transition metal ions NEUTRAL CATIONSNEUTRAL ANIONSCations of STRONG BasesAnions of STRONG + + + - - - - - 2+ 2+ 2+ AcidsLi , Na , K ,Cl , Br , I , NO , ClO Ca3, Ba , S4 BASIC CATIONS - - - BASIC ANIONSNone (think about why)1. Anions of WEAK acidsF , CH COO , ClO 3 - - - - - - 2- 2- HCOO , CN , NO 2. Most2anions of polyprotic acidsHCO , HS , HCO , HPO CO , 3 3 4 3 2- 2- 2- 3- SO ,4SO 3 , S , PO 4


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