Suppose you are in your chemistry lab conducting an experime

Suppose you are in your chemistry lab conducting an experiment and you made the following mistakes. Would they make the calculated value for your molar volume of O2 at STP go up, down, or not change at all? 1. You failed to take out the vapor pressure of water when determining the 02 pressure. 2. When you put the bunsen burner flame to your glass test tube, you had a flame that left black soot on the outer part of the test tube. You then failed to remove it before weighing your sample

Solution

1. If you don\'t take out the vapor pressure of water, your O2 pressure will be more than the true value which will result in decrease in volume of O₂. Since, pressure and volume are inversely proportional to each other.

2. Mass of sample will come out to be more than the true value which will represent more number of moles of O₂ generated which will finally result in more volume of O₂ as compared to true value. Since, moles and volume are proportional to each other.