Theory: When potassium chlorate is heated, it will decompose to give oxygen gas, which may be collected and its volume measured. Since the gas will be collected over water, Dalton’s Law must be used to correct for the water vapor present. The STP volume occupied by the gas may be calculated. From a knowledge of the weight of gas produced and the STP volume of the gas produced, the STP molar volume may be determined. Also using the weight of gas produced together with the balanced equation, the weight of potassium chlorate in the mixture may be determined. The mixture will consist of KCL, and inert ingredient for bulk; MnO2, a catalyst to ensure that the decomposition is rapid and complete’ and KCLO3, the compound which is being decomposed.

3) Weight of test tube. 20.7683 g 21.6226 g

(273.89 / .3356) * 32g/mole = (198.03 / .2838) * 32 g/mole =

C) Pressure of O2 alone. 733.073 torr 731.317 torr

F) Percent error 1.25% .44%

223.5 * (731.317 / 752.9) * (273.15 / 295.15) =

Some topics in this essay:
Procedure Assemble, Pressure O2, Data Trial, Dalton’s Law, Gas Purpose, Calculations Weight, Error Analysis, test tube, stp volume, volume gas, molar volume, water level, gas collected, gas produced, weight test tube, flask beaker, weight test, water level inside, tube mixture, weight gas produced, test tube mixture, gas produced stp,