lOMoARcPSD|3013804
Lab 7 Precipitation
Reactions
CHEM101L
lOMoARcPSD|3013804
Student Name: Aitor
Access Code (located on the lid of your lab kit): RP-00000088280
Pre-Lab Questions:
1. Under what conditions will a precipitate form?
A stimulus response is produced when the cations of one reagent and the anions of a
subsequent reagent that are in aqueous arrangements consolidate to frame a strong insoluble
ion called a hastening.. It is known as an precipitate when an answer that is made out of a
cation meets one more solutuion that is made out of an anion.
2. What information do you need to calculate percent yield?
The most important thing is the formula and then the procedure:
Formula: (actual yield/ theoretical yield)*100.
Process: At first, the equation is equalized by putting the reactants on one side and the products
on the other. Then, by some calculations, the molar mass is obtained. And finally, the above units
are
converted into number of moles.
3. Where can you go to find the information regarding the atomic mass of an element?
It can be seen in the periodic table. The number of protons and neutrons determines the mass
number of the element. If you wanted to calculate how many neutrons an atom has, you would
only have to subtract the number of protons from the mass number.
4. Why is atomic mass significant to calculating percent yield?
Atomic mass is important to compute percent yield, since we really want upsides of items and
reactants in moles and afterward calculcal the yield and not by mass. Also, is important because
it gives the elements in moles
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