D1 Task 5 level 3 BTEC science Unit 4 Assignment 1 - Identifying unknown substances & concentrations
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Task 5 (D1)
12986391
Iman B.Zamani
A, Evaluate each of the procedure you carried out. outline any potential source of
error in the procedure and suggest improvements or of chairman for each of the
methods of procedures in task 1, 2 and 3 used.
When talking about potential sources of oral there is many point where we could have sale
or did an error without noticing, Jeremy's are some point where I see that I could have
improved when doing the practical:
● I did talk about this in the writers of all the experiments done but I will talk about them
more careful I'm giving more ideas to improve them, so the first one would be From
the flame test experiment in that as I said in the writerup there was no need to take a
lot of salt because with a small thing you could already see the colour and judge from
name given, also the way that the soul result of poor people to grab the right so it
was very messy, there was a lot of people trying to reach the same song and that
made it difficult to take the right so in the cups of h last of Swords there was the
name of the salt, but because many people was trying to reach them they all got
mixed up at the end of the practical so you could not tell what salts was what, also
because we take much more so than it was needed, when did the milk in the
hydrochloric acid and after that in the soul because there was a love song in the
plate, when taking the loop near the flame to see the colour the loop will get all
types of burnt salt and that make it difficult to reuse it because the loop will have so
many Residues from other so it will you need to get changed and that was time
consuming and also we were wasting not just salt but as well as The Wire, then
when trying to get the flame colour we would usually slaves being more for very long
time in the frame so that made it very confusing to get the colour, the right thing to
do is to get a conclusion from the first shade of flame colour given at the very
beginning of the test, also with not knowing how to set up this flame could potentially
give a wrong reading of flame colour because as the task sheet says the flame
should be yellow when not in use and glue when testing a salt, now as we talked
before in task 4 contamination is a very important point to take in consideration,
because this is a thing that will be present in any practical carried out in a lab, what
could have potentially be contaminated from things practical is when taking the salts
from the stock salts, when other colleagues were also taking them, I would see
people using the same spatula to take different types of salts, and this could
definitely have giving me or somebody else a wrong colour name in a test, also not
using gloves or having the surface works dirty or contaminated with different salts
could definitely have something to do with either wrong results or Confusion when
trying to get the flame colour, so what I would advise to prevent some of these, for
example decontamination of stock salts would be losing a spatula with the name of
the salt not just in the special number also in the Beaker that has the salt, so
everyone would know that this spatula is only to take this type of salt from the right
beaker, also advising my colleagues or if it was the technician saying it the student's
that's a very small pinch of each sides would be more than enough, not just to
prevent wasting of salt but also wasting for choir and having to change the wire which
is very time-consuming.
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