A student found that her mixture was 15 percent NH4cl 20 percent NaCl and 75 percent Sio2 Assuming her calculations are correct what did she most likely do incorrectly in her experiment?
Her calculations are in excess of 100%, and add to 110%. She therefore measured the three ingredients of the mixture incorrectly.
Well, it seems like our student may have had a bit of a "mix-up" in her experiment! You see, the percentages she mentioned don't quite add up to 100 percent. It's a classic case of "percentage puzzle perfection" gone wrong! It's possible that there was an error in measuring or calculating the amounts of each component. Or maybe she accidentally dropped a few grains of comedy gold into the mix! Either way, it appears our student might want to double-check her calculations to achieve that perfect 100 percent mixture. And remember, there's no shame in a little mix-up – even professional clowns trip over their own feet sometimes!
Based on the given information, the student found that her mixture was composed of 15% NH4Cl, 20% NaCl, and 75% SiO2. If the student's calculations are correct, it is most likely that she made a mistake in the experimental procedure rather than the calculations themselves.
Possible errors in the experiment could include:
1. Incorrect weighing or measuring: The student may have inaccurately measured the amounts of each component used in the mixture, leading to an incorrect composition.
2. Contamination: It is possible that the components of the mixture were contaminated with other substances, which can affect the calculated percentages.
3. Incomplete or partial reactions: If there were any chemical reactions involved in the experiment, the student may not have allowed them to proceed to completion or may not have accounted for incomplete reactions, leading to inaccurate results.
4. Loss of material: Some of the substances used in the experiment, such as NH4Cl or NaCl, may have been lost through evaporation or spillage, resulting in an incorrect composition.
It is important to note that without additional information or details about the experiment, it is difficult to determine the exact mistake made by the student. Further investigation and analysis of the experimental procedure would be necessary to identify the specific error.
To determine what the student most likely did incorrectly in her experiment, we need to consider the percentages of the different components in the mixture and the expected behavior of these components during the experiment.
From the given information, the percentages of the components in the mixture are as follows:
- 15% NH4Cl
- 20% NaCl
- 75% SiO2
The sum of these percentages is equal to 110%, which is greater than 100%. This suggests that the student most likely made a calculation error in determining the percentages of the components in the mixture.
To find out what the correct percentages should be, we need to ensure that the sum of the percentages is equal to 100%. Therefore, we need to normalize the percentages by dividing each percentage by the sum of all percentages (15% + 20% + 75% = 110%).
We can calculate the corrected percentages as follows:
- Corrected percentage of NH4Cl = (15% / 110%) * 100% ≈ 13.64%
- Corrected percentage of NaCl = (20% / 110%) * 100% ≈ 18.18%
- Corrected percentage of SiO2 = (75% / 110%) * 100% ≈ 68.18%
Therefore, the corrected percentages for NH4Cl, NaCl, and SiO2 in the mixture would be approximately 13.64%, 18.18%, and 68.18%, respectively.
Based on these calculations, we can conclude that the student made an error in calculating and reporting the percentages of the components in the mixture.