A sample of solid potassium chlorate (KClO₃) was heated in a test tube (see Fig. 5.10) and decomposed according to the following reaction:

The oxygen produced was collected by displacement of water at 22°C at a total pressure of 754 torr. The volume of the gas collected was 0.650 L, and the vapor pressure of water at 22°C is 21 torr. Calculate the partial pressure of O₂ in the gas collected and the mass of KClO₃ in the sample that was decomposed.

Figure 5.10

Transcribed Image Text:

2KCIO3(s) 2KCl(s) + 302(g)