NaNO3 on heating at a ceartain temperature T gives NaNO2 and O2 and 85g of NaNO3 on heating at temperature T gives 8g of O2. what is the percentage dissociation of NaNO3???
 

Asked by Anu | 19th Jun, 2014, 12:12: PM

Expert Answer:

2 NaNO3 --> 2NaNO2 + O2
Molar mass of NaNO3 is 85 g
Hence 85 x 2 = 170 g NaNO3 produces 32 g O2
Then 85 g NaNO3 should produce 16 g O2
But it actually produces 8 g O2
Hence, percent dissociation of NaNO3 = 8/16 x 100 = 50 %

Answered by Prachi Sawant | 20th Jun, 2014, 03:04: PM