Lecture 13 - Redox, Titrations, Reactions in Solution

Lecture 13 - Redox, Titrations, Reactions in Solution -...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 13: Redox; titrations; reactions in solution Oxidation-Reduction Reactions Oxidation Oxidation Originally: 2 Cu(s) + O 2 (g) 2 CuO(s) 2 CO(g) + O 2 (g) 2 CO 2 (g) Cu and CO are oxidized. O 2 is the oxidizing agent for both. Reduction Reduction Originally: reduce ore to metal ; CuO(s) + H 2 (g) Cu(s) + H 2 O SnO 2 (s) + 2 C(s) Sn(s) + 2 CO(g) CuO and SnO 2 are reduced. H 2 and C are the reducing agents (note: H 2 is oxidized, so CuO is an oxidizing agent) 1-1 1-3
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Oxidation-Reduction Reactions In all cases: •R e d o xr e a c t i o n s m o v e e - . 2 Ag + (aq) + Cu(s) 2 Ag(s) + Cu 2+ (aq) Here: •C u c h a n g e s t o C u 2+ . u l o s e s 2 e - ; each Ag + gains one e - •A g + is reduced (ore turned to metal) Gain of e - = reduction (so, loss of e - = oxidation) +2 e - -2 e - Oxidation is loss Reduction is gain Redox Reactions and Electron Transfer Oil Oil rig rig 2-1 2-2 Balances electrons 2-7 2-8
Background image of page 2
M is a reducing agent X is an oxidizing agent MX e - M loses electron(s) X gains electron(s) M is oxidized X is reduced Redox Reactions and Electron Transfer Oxidizing Agent Reaction Product O 2 (oxygen) O 2 - (oxide ion) H 2 O 2 (hydrogen peroxide) H 2 O( l ) F 2 , C l 2 , Br 2 , I 2 (halogen) F - , C l - , Br - , I - (halide ion) HNO 3 (nitric acid) nitrogen oxides (NO, NO 2 ..) Cr 2 O 7 - (dichromate ion) Cr 3+ (chromium(III) ion) MnO 4 - (permanganate ion) Mn 2+ (manganese(II) ion) Reducing Agent Reaction Product H 2 (hydrogen) H + or H 2 O CC O a n d C O 2 M (metal: Na, K, Fe…. .) M n+ (Na + , K + , Fe 3+ …..) Common Oxidizing and Reducing Agents
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/12/2012 for the course CHEMISTRY 131 taught by Professor Lacey during the Fall '11 term at SUNY Stony Brook.

Page1 / 12

Lecture 13 - Redox, Titrations, Reactions in Solution -...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online