Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Order of Density |
Li < K < Na < Rb < Cs |
K is lighter than Na |
|
|
Color of oxidising flame |
Li - Crimson Na - Yellow K - Violet Rb - Red Violet Cs - Blue |
|
|
|
Used in photoelectric cells |
Caesium and Potassium |
Ionization enthalpy decreases down the group |
|
|
Reaction with O2 |
Li - Monoxide Na - Peroxide K,Rb, Cs - Superoxide |
|
|
|
Reaction with N2 |
Li - Li3N |
Li shows diagonal relationship with Mg |
|
|
Reaction with Hydrogen |
Ionic hydrides |
|
|
|
Reaction with Halogens |
Li - somewhat covalent halides Others - ionic |
|
|
|
Most covalent halide |
Lithium Iodide |
Fajan's rule : small cation + large anion = covalent |
|
|
Reducing Nature |
Li - strongest Na - weakest |
|
|
|
Reaction with liq. NH3 |
Blue solution due to ammoniated electron, Paramagnetic. On standing, H2 released and MNH2 formed. Concentrated solution: Blue paramagnetic ----> Bronze diamagnetic |
|
|
|
Formation of hydroxides |
Hydrolysis of oxides Hydroxides are white crystalline solids |
|
|
|
Oxide/Hydroxide/Carbonate + Hydrohalic acid |
Halide |
|
|
|
Melting Points of Halides |
Fluoride > Chloride > Bromide > Iodide |
|
|
|
Reaction with Oxo-Acids |
Salts which are generally soluble in water and thermally stable |
|
|
|
Stability of Carbonates |
Increases down the group |
LiCO3 polarises and forms Li2O and CO2 |
|
|
Stability of Bicarbonates |
Increases down the group |
LiHCO3 doesn't exist as a solid |
|
|
Reactivity |
Increases down the group |
Ionization enthalpy trend |
|
|
Hydrates of Metal Chlorides |
Only LiCl.2H2O |
|
|
|
Reaction with ethyne |
All metals except Li form ethynide |
|
|
|
Decomposition of nitrates |
LiNO3 ----> Li2O + NO2 + O2 Others give MNO2 |
|
|
|
Preparation of Washing Soda |
Solvay process NaCl is the starting reagent |
|
|
|
Heating Washing Powder |
Washing Powder ---> Monohydrate ---> Anhydrous Soda Ash |
|
|
|
Preparation of Caustic Soda |
Castner-Kellner Cell Mercury cathode, Carbon anode Chlorine evolved at anode |
|
|
|
Preparation of Baking Soda |
Sodium Carbonate solution saturated with Carbon Dioxide. Sodium Bicarbonate is less soluble so it settles down. |
|
|
|
Magnetic properties of oxides |
Oxides, peroxides - dimagnetic Superoxides - paramagnetic |
|
