What Percent Yield Should Be 100 %?
Ideally, the percent yield should be 100%, as this means that you have recovered 100% of that material. A yield over 100% would mean that the substance still has some traces of another material that is adding additional mass. Ex. The iron filings having some sand particles leftover. A yield under 100% would mean that some of the substance was not recovered, it could have been lost (spilled) or found in another substance (not separated completely). The percent yields may give some insight into what occurred during the procedure. For example if the percent of iron is >100, but the percent of sand is <100 then it may show that some sand was not separated from the iron, and was measured with that material.
The tare button on the balances will …show more content…
Also since the iron was a powdery substance some still remained in the sand/salt mixture. This may raise or lower the recovered mass depending on how thorough the group was is separating out the iron. Or it may balance out leaving a almost 100% recovery percent. This may also raise the salt or sand recovery percent due to the leftover iron. Because the salt was dissolved into water anything that was moistened by the water would leave a salt residue when dried. This was noticed on the sand as white dust. This will lower the salt recovery but raise the sand recovery.
If there is “extra” product this may be some of the other materials from the mixture that wasn’t separated, such as iron or salt. This can be as the separation techniques used aren’t perfect and won’t extract 100% of the material in some cases.
The missing salt could be lost as not all the water/salt mixture was poured into the flask. Some was left behind in the flask used in filtration and some was left in the sand.
One heterogeneous mixture was the the rocks and beads. The distinct shape and colouration of the beads as well as the large size of both materials made it easy to distinguish them.
One heterogeneous mixture was the water and salt. As it looked just like water( no salt granules).
The iron filings was a pure substance as it isn’t a mixture. It is just
The tare button on the balances will …show more content…
Also since the iron was a powdery substance some still remained in the sand/salt mixture. This may raise or lower the recovered mass depending on how thorough the group was is separating out the iron. Or it may balance out leaving a almost 100% recovery percent. This may also raise the salt or sand recovery percent due to the leftover iron. Because the salt was dissolved into water anything that was moistened by the water would leave a salt residue when dried. This was noticed on the sand as white dust. This will lower the salt recovery but raise the sand recovery.
If there is “extra” product this may be some of the other materials from the mixture that wasn’t separated, such as iron or salt. This can be as the separation techniques used aren’t perfect and won’t extract 100% of the material in some cases.
The missing salt could be lost as not all the water/salt mixture was poured into the flask. Some was left behind in the flask used in filtration and some was left in the sand.
One heterogeneous mixture was the the rocks and beads. The distinct shape and colouration of the beads as well as the large size of both materials made it easy to distinguish them.
One heterogeneous mixture was the water and salt. As it looked just like water( no salt granules).
The iron filings was a pure substance as it isn’t a mixture. It is just