CH1012
L1 /
‹#›
L1 /
7
GROUP 1A + H2O
Reactivity of groups IA and IIA
(a) Reaction with water
Group 1A + H2O M = Li,Na,K,Rb,Cs
ØLi reacts slowly with H2O at 25oC
ØNa reacts vigorously, K with a flame
2M + 2H2O ® 2MOH + H2
Ø Rb and Cs EXPLOSIVELY M.
• This reactivity pattern reflects
the increasing tendency down
the Group to form the cation M+
and the high mp. of Li.
the increasing tendency down
the Group to form the cation M+
and the high mp. of Li.
