4.215 g of a metallic carbonate was heated in a hard glass tube and the co2 evolved was found to measure 1336 ml at 27oc and 700 mm pressure. what is the equivalent weight of the metal?

p1= 760mm p2= 700mm

v1 = ? v2 = 1336mL

T1=273K T2= 27+273= 300k

P1V1/T1 = P2V2/T2

760*V1/273 = 700*1336/300

V1= 7*1336*273/3*760

=1119.7mL = 1.119L

therefore 1.119L CO2 = 4.215 g metallic carbonate

22.4L CO2 is given by 4.215*22.4/1.119g metallic carbonate

= 84.37g

Metal carbonate is MCO3 = M+12+48

= M+60

Atomic weight of M = 84.3-60 =24.3

Equivalent wt of metal = Molecular weight/2

= 24.3/7

= 12.18