rovided
can probably remove one instance of "provided"
rovided
can probably remove one instance of "provided"
weak electrolytes
Not always
is
Present tense
Tf
I dont see an average Tf value, which would be good to have. You should probably explain how exactly to rearrange eq 1 to get the slope in your methods. You have a good discussion about what the error and precision mean, but it can be expanded on a little bit. Otherwise its a solid results and discussion section
presentation
The calculations section is a little hard to follow, and there is an instance of a present tense word in your methods. (paragraph 1, is). Other than that, it needs a little bit of shortening/taking out redundant words. But it is pretty solid.
explained
i is not 1 for weak electrolytes, because they still dissociate just not fully. We cant calculate i for weak electrolytes yet. Your introduction is pretty solid, but it needs a bit of succinctness. There are a couple types that need to be fixed too, such as "complexly"
you
Cant use you.
our
Cant use "our." its too close to "us"
Tf
Its presented as 1.4 C, but the calculated class average is 2.4 C
Discussion
Good job explaining exactly what the % error and r squared value mean.
Methods
The methods are decent. The chronological order and some of the wording should be checked on a part or two, but otherwise its good.
Introduction
Strong introduction, I like how you jump right into explaining exactly what the reader should know.
procedur
in paragraph 2, the first sentence says 8 grams of lauric acid and benzoic acid were used, but 8 grams of benzoic acid were not used.
easy to follow
Good introdduction section, except it is a little scattered and it might be better off with some shortening/ making it more concise.
Al
All tables figures and eqns check out.
depression
This report is pretty strong, but can use a little bit of work. Mainly just shortening up sentences to be more concise. Another thing to work on is to explain which points of data were important on the labquest. Otherwise good job.
Freezing
This report does a good job of explaining the results of the experiment, and thoroughly introduces what exactly a colligative property is. Good job.
average
Two instances of the word "average" are unnecessary. you can remove one or the other and the sentence will have the same meaning
Itβs
This is a run on sentence and I would shorten it a bit. But it does make a good point
freezingpoint depression
I would re-word this so that you use the words "freezing point depression" less. Maybe say "Tf represents the change in temperature from the initial freezing point"
specific heat capacity
you found the specific heat capacity
kJ/mol
missing the actual value
mol
how did you get moles
3.42 x 10^3 J,
convert into kj
weighed
unnecessary to say that 1g was weighed
used
agreed
Equation
no explanation of eq 3
This w
there is minimal discussion, this person just said "yeah we were off." there should be discussion of accuracy and precision.
negating
you dont negate it
moles
how?
πΆπΰ¬Ά(ΰ―ΰ―€) + π»ΰ¬Άπ(
goes in intro
Hessβs La
need description of hess's law
liquid is measured at the end
This should go in the methods section, it has too much of an instruction feel to it.
Equation 1
all equations go in the introduction
metal rod
lack of explanation of thermodynamics.
massed,
measured/ weighed
measured
There is little background information on the subject. No equations or summary. A thermometer measure temperature changes, not a calorimeter.
10 mL
Probably shouldnt say the 10 mL pipette measured out 10mL of fluid. just say itonce.
Questions 1-5 in the lab packet
Reader does not have access to the lab packet.
half-way
Need numerical value.
Picture
The graph should go in the R+D Section.
ther the three density reco
This is an equation disguised as a method, and thus should have gone into the introduction section.
ictur
No descriptive caption is provided to go along with "picture 1"
y=mx+b
This should have gone in the introduction section, with the rest of the equations used in the lab.
After doing the three trials calculate the averagedensity by adding to
Still not passive voice
l inpu
active voice
First subtractthe initial volume from the final volume, take the answer and input it into equation 1 asthe volume or βvβ in this case, the result given is the density of the rod
Not in passive voice.
ππππ ππ‘π¦ = ΰ― ΰ―
This should have gone into the introduction section.
od by the finalvolume.
This is incorrect, as the students should have used the difference between the final volume and the initial volume, to get the volume of the rod.