If an air bubble accidentally enters the gas-collecting test tube, how
would this affect:
a. The reported number of moles of KCIO3
decomposed? Explain.
b. The reported molar volume of O2
gas? Explain.
a. Well, if an air bubble decides to join the party in the gas-collecting test tube, it can definitely affect the reported number of moles of KCIO3 decomposed. You see, air is a mixture of different gases, like nitrogen, oxygen, and some other trace elements. When we calculate the moles of KCIO3 decomposed, we assume that the only gas being collected is oxygen. So, if an air bubble pops in, it will increase the volume of gas collected, making it seem like more KCIO3 has decomposed than it actually has. Sneaky little bubble, huh?
b. As for the reported molar volume of O2 gas, this air bubble has a knack for stirring things up. Since the bubble contains gases other than oxygen, it will increase the total volume of gas collected in the test tube. Therefore, when we calculate the molar volume of O2 gas, we will end up with a higher value than expected since the volume includes the additional gases from the air bubble. In other words, that mischievous bubble is inflating the molar volume like a clown with a balloon animal. Oh, what a circus!
a. The presence of an air bubble in the gas-collecting test tube would affect the reported number of moles of KCIO3 decomposed.
To understand why, let's first understand the process of collecting gases. When gases are collected, they are often collected through the displacement of water or another liquid. The gas produced (in this case, O2 gas from the decomposition of KCIO3) displaces the liquid in the container, and the gas gets collected in an inverted test tube or burette.
Now, if an air bubble accidentally enters the gas-collecting test tube along with the O2 gas, it would essentially take up some space in the test tube. This means that the total volume of gas collected (which includes both the O2 gas and the air bubble) would be larger than the actual volume of O2 gas produced.
To calculate the number of moles of KCIO3 decomposed, we need the volume of O2 gas collected. However, since the air bubble is not O2 gas, including its volume in the calculation would lead to an overestimation of the moles of KCIO3 decomposed. This, in turn, would result in an inaccurately reported number of moles of KCIO3 decomposed.
b. The presence of an air bubble would also affect the reported molar volume of O2 gas.
Molar volume is defined as the volume occupied by one mole of gas under specific conditions (typically at standard temperature and pressure, STP). When calculating the molar volume of O2 gas, we need to divide the volume of O2 gas collected by the number of moles of O2 gas.
Since the presence of an air bubble increases the total volume of gas collected (as discussed in part a), this would lead to an overestimation of the molar volume of O2 gas. The reported molar volume would be larger than the actual molar volume of O2 gas produced.
In summary, the presence of an air bubble in the gas-collecting test tube would result in an inaccurately reported number of moles of KCIO3 decomposed and an overestimated molar volume of O2 gas. To obtain accurate results, it is important to ensure that only the gas of interest (O2 gas in this case) is collected and measured, without any unwanted contaminants like air bubbles.
a. If an air bubble accidentally enters the gas-collecting test tube, it would affect the reported number of moles of KCIO3 decomposed.
Explanation:
When KCIO3 decomposes, it releases oxygen gas (O2). The volume of the gas collected is directly proportional to the number of moles of O2 produced. However, if an air bubble is present in the test tube, it will occupy space within the tube, reducing the effective volume available for the collection of O2.
As a result, the total volume of gas collected would be larger than the actual volume of O2 produced. This means that the reported number of moles of KCIO3 decomposed, calculated based on the collected volume, would be higher than the actual value.
b. If an air bubble accidentally enters the gas-collecting test tube, it would affect the reported molar volume of O2 gas.
Explanation:
The molar volume is defined as the volume occupied by one mole of a gas. In this case, the molar volume of O2 gas would be calculated by dividing the volume of collected gas by the number of moles of O2 produced.
However, if there is an air bubble present in the test tube, the volume of the bubble will occupy space within the tube, effectively increasing the total volume of gas. This means that the reported molar volume of O2 gas would be higher than its actual value.
In both cases, the presence of an air bubble introduced a source of error that affects the accuracy of the reported values. To obtain accurate results, it is important to ensure that no air bubbles are present in the gas-collecting test tube during the experiment.