Question

1.60 of metal were dissolved in HNo3 to prepare its nitrate .The nitrate on strongly heated gives 2g oxide .The equivalent weight of metal is

Answer 1

the equivalent weight of metal is 32.

Answer 2

1.60 of metal were dissolved in $HNO_3$ to prepare its nitrate .The nitrate on strongly heated gives 2g oxide .The equivalent weight of metal is 32.

From the given

Mass of metal oxide = 2 g

Molar mass of oxygen = $16 { g }/{ mol }$ = 1.6 g

Mass of oxygen present in the oxide = 2 - 1.6 = 0.4 g

Atomic number of oxygen = 8

Solution:

Equivalent weight of metal =$\left( \frac { Mass\quad of\quad metal }{ mass\quad of\quad oxygen\quad in\quad the\quad metal\quad oxide } \right)\quad \times \quad Atomic\quad number$

$=\quad \frac { 1.6 }{ 0.4 }\quad \times\quad 8\quad =\quad 32$

Therefore, equivalent weight of metal is 32.