Daltons

John dalton was an english chemist who proposed the atomic theory. he also found that in the absence of a chemical reaction the pressure of a mixture of gases is equal to the sum of the individual pressures exerted by each gas alone. daltons law of partial pressure says that the total pressure of a misture of gases is equal to the sum of the partial pressures of the component gases. Pt = P1 + P2 +.....


 * PROBLEM:**OXYGEN FROM THE DECOMPOSITION OF POTASSIU CHLORATE (KCLO3) WAS COLLECTED BY WATER DISPLACEMENT. THE BAROMETIC PRESSURE AND THE TEMPERATURE DURING THE EXPERIMENT WERE 731. MM Hg AND 20 C,RESPECTIVELY. WHAT WAS THE ARTIAL PRESSURE OF THE OXYGEN COLLECTED?

GIVEN: PT= Patm= 731 mm Hg Ph2o= 17.5 mm Hg Pt = Patm = Po2 + Ph2o UNKNOWN: Po2

Po2= Patm - Ph2o=731- 17.5 = 713.5 mm Hg