Some nickel sulfate solution was carefully placed in the bottom of a beaker of water. The beaker was then covered and left for s
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Answer:
See figure 1
Explanation:
If we want to find the acid and the Brønsted-Lowry base, we must remember the definition for each of these molecules:
-) Acid: hydrogen donor
-) Base: hydrogen acceptor
In the <u>caffeine structure,</u> we have several atoms of nitrogen. These nitrogen atoms have the ability to <u>accept</u> hydronium ions (). Therefore the caffeine molecule will be the base since it can accept
If caffeine is the base, the water must be the acid. So, the water in this reaction donated a hydronium ion.
<u>Thus, caffeine is the base and water the acid. (See figure 1)</u>
Answer : The percent purity of in the original sample is 87.94 %
Explanation :
The given balanced chemical reaction is:
First we have to calculate the mass of Fe.
Molar mass of Fe = 55.8 g/mole
Now we have to calculate the moles of
From the balanced chemical reaction we conclude that,
As, 2 moles of Fe produced from 1 mole of
So, of Fe produced from
mole of
Now we have to calculate the mass of
Molar mass of = 159.69 g/mole
Now we have to calculate the percent purity of in the original sample.
Mass of original sample =
Therefore, the percent purity of in the original sample is 87.94 %