Or REGISTER
Free Chemistry Help
I provide Free Chemistry Help upto High School Level. Just place your questions at the Free Chemistry Help Forum and they will be answered in no time.
Chemistry Quizzes
 I provide Practice questions in Chemistry to the students on this website. Detailed quizzes with answers have been compiled for all the courses offered here. For Chemistry Quizzes, please click here.
Useful Resources

Important Chemical Reactions

Displacement Reactions and Net Ionic Reactions

LiveZilla Live Help
Displacement Reactions
Single Displacement reaction :

When one element displaces another element from a compound and takes its place, the reaction is called a displacement reaction. This is based on reactivity series of the elements .

Potassium  

 

 

 

Sodium  

Reacts with cold water

 

 

Most reactive metals

Lithium  

Reacts with acids

 

 

Calcium  

 

 

 

Magnesium  

 

 

Reacts with Oxygen

 

Aluminium  

 

 

 

 

Zinc  

 

 

 

 

Iron  

 

 

 

 

Tin

 

 

 

 

Lead  

 

 

 

 

Copper  

 

 

 

Most unreactive metals

Mercury  

 

 

 

 

Silver  

 

 

 

 

Gold

 

 

 

 

Examples of Single Displacement Reactions

Less reactive metal can not displace more reactive metal from its compounds .

Zn (s)+ CuSO4 (aq) ZnSO4 (aq) + Cu(s)

Color changes from bluish green to colorless.

Zn is more reactive than Cu

ZnSO4 (aq) + Cu(s) No reaction

Cu is more reactive than Zn

Fe (aq)+ CuSO4 (aq) FeSO4(aq) +Cu(s)

Color of the solution changes from blue to light green .

Mg(s) + ZnCl2(aq) MgCl2(aq)+Zn (s)

2KI(aq) + Cl 2 (g)2KCl(aq) + I 2 (s)

Zn (s)+ MgCl2(aq) no reaction

2K(s)+2H2O 2 KOH(aq) + H2(g)

2 Na(s) +2H2O(l) Ca(OH)2 (aq)+ H2(g)

Mg (s)+H2O (aq)Mg(OH)2 (aq)+H2 (g)

Fe(s)+ 4H2O(l) Fe3O4(aq)+4H2(aq)

2K(s) + 2HCl(aq) 2 KCl (aq)+H2 (g)

Violent reaction with Cold dilute acid

Zn(s)+2HCl(aq) ZnCl2(aq)+H2(aq)

Reacts Vigorously with Cold dilute acid

Fe(aq)+2HCl(aq) FeCl2+H2

Reacts Slowly quietly with Cold dilute acid

Pb (aq)+ HCl(aq) PbCl 2 (aq)+H2 (aq)

Reacts with Hot Conc acid

 

Double Displacement Reaction :

      A reaction in which the constituent of two compounds mutually exchange their ionic radicals to form two different compounds is called a double decomposition reaction.

Examples of Double Displacement Reactions

Na2SO4 (aq)+ CaCl2   (aq)      CaSO4 (aq)+ 2 NaCl (aq)

Precipitation reaction : In aqueous medium compounds react to form an insoluble residue as one of the products.

NaCl  (aq)  + AgNO 3  (aq)  AgCl  (s) +   NaNO3

Pb (NO3)2 (aq)   + Na2SO4 (aq)     PbSO4 (S) +   2NaNO3   (aq)

FeCl2 (aq) +  2NaOH (aq)    Fe (OH)2 (S)+   2NaCl (aq)

Solubility Chart

Solubility of Common Compounds in Water


Negative Ions (Anions) Positive Ions (Cations) Compounds
essentially all    alkali ions soluble*Alkali ions = Li+, Na+, K+, Rb+, Cs+, Fr+
essentially all  hydrogen ion, H+ soluble
essentially all ammonium ion, NH4+ soluble
nitrate, NO3-   essentially all soluble
acetate, CH3COO-  essentially all soluble
chloride, Cl- bromide, Br- iodide, I- 

Ag+, Pb2+, Hg22+, Cu1+  low solubility

all others are soluble

sulfate, SO42-  

Ca2+, Sr2+, Ba2+, Pb2+, Ra2+, Ag+, Hg2+low solubility  

all others soluble

sulfide, S2-   

alkali ions*, H+, NH4+, Be2+, Mg2+, Ca2+, Sr2+, Ba2+, Ra2+   soluble 

all others low solubility

hydroxide, OH-  

 alkali ions*, H+, NH4+, Sr2+, Ba2+, Ra2+   soluble

 all  others  low solubility

phosphate, PO43- , carbonate, CO32-, sulfite, SO32-

alkali ions*, H+, NH4+  low solubility

all others soluble

FeCl 2 (aq)  +  2NaOH  (aq)   Fe(OH) 2  (aq) +  2NaCl (aq) 

Pb(NO3)2  (aq) +   Na2SO4    (aq)    PbSO4 (s)   + 2 NaNO3 (aq)


 

Home I How it works I FAQ I Contact Me I Free Homework Help I Quizzes I My Blog
High School Chemistry
College Chemistry
Test Prep Chemistry
Physics
Math
Biology
website security
Copyright 2001-2014 chemtopper.com - All Rights Reserved | Sitemap