How is `O_(3)` estimated quantitatively ?

Why is it essential to wash the precipitate with water before estimating it quantitatively?

400cc of N_2 at 600mm and 500cc of O_2 at 300mm are quantitatively transferred in to an empty vessel of X 2 L capacity. Calculate the pressure of the mixture and partial pressures.

1 g of an organic compound containing oxygen is heated with graphite and carbon monoxide formed is quantitatively converted to 0.1375 g CO_(2) on reaction with I_(2)O_(5) calculate the percentage of oxygen in the compound.

Photosynthetic organisms occur at different depths in oceam. Do they receive qualitatively and quantitatively the same light ? How do they adapt to carry out photosynthesis under these conditions ?

Which of the reaction does not give quantitative yield of the expected product ?

There are two types of iodine titrations (a) Iodometric & (b) Iodimetric, Iodometric method is indirect method of I_(2) estimation. Any oxidant which liberates I_(2) from KI solution, the liberated iodine is estimated by titrating it with Na_(2)S_(2)O_(3) solution as : I_(2)+2Na_(2)S_(2)O_(3)rarr2NaI+Na_(2)S_(4)O_(6) 100 mL of .x. M K_(2)Cr_(2)O_(7) solution is added to excess of KI solution in acidic medium. The liberated iodine required 50 mL of 0.1N Na_(2)S_(2)O_(3) solution. The value of x is