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Posted: Sun Oct 06, 2019 9:10 pm
I know this was kind of addressed in a question someone asked earlier but I just wanted to ask if we would be marked down if we left the stoichiometric coefficient as a fraction? I know different professors prefer different things so I just wanted to clarify to see if it would necessarily be seen as a mistake if we left the fraction instead of multiplying both sides to get rid of it?
Posted: Sun Oct 06, 2019 9:13 pm
I'm guessing it's always best to make the fraction into an integer. I've heard that that is the way it's done in the scientific field and that it is preferred by many since it is more user friendly for future calculations.
Posted: Sun Oct 06, 2019 9:41 pm
In past chemistry classes, we have converted the fraction to a decimal and rounded to the correct number of sig figs. I assume Lavelle will prefer we do this since that is typically how figures are reported on lab reports and other experimental documents.
Posted: Sun Oct 06, 2019 11:07 pm
I would assume changing the fraction to an integer is the only way you would get full credit. The purpose of making a fraction is so that it's easy to convert all of the elements coefficients to whole numbers.
Posted: Mon Oct 07, 2019 11:42 pm
They might give you partial credit though even if you leave it in fractions as long as you show your work.
Posted: Tue Oct 08, 2019 12:13 pm
I would change the fraction to an integer since the equation is supposed to represent the exact reaction with the smallest whole integers, not a fraction of it.
Posted: Tue Oct 08, 2019 12:33 pm
I would personally refrain from keeping fractions in the formula because of how easy of a fix it is. All you really have to do is multiply everything by the denominator to remove the fraction. It's an easy fix for something you won't have to worry about later.
Posted: Wed Oct 09, 2019 1:01 am
Dr.Lavelle states it's better that the fractions are left in whole numbers when balancing equations. Since he prefers it that way, I think it is better to keep the habit of doing it often when it comes down to fractions in a chemical equation.
Posted: Wed Oct 09, 2019 2:52 pm
You should multiply all coefficients to make them whole integers, especially if the question is asking for a molecular or empirical formula.
Posted: Wed Oct 09, 2019 6:24 pm
It's generally good practice to convert all the coefficients to integers, as that gives the most accurate representation of the chemical reaction.
Posted: Thu Oct 10, 2019 10:56 am
I would convert all fractions into an integer but using fractions is a good way to keep the numbers straight and helps initially with balancing.
Posted: Thu Oct 10, 2019 11:44 am
I would say convert it to an integer
Posted: Thu Oct 10, 2019 12:36 pm
I think it's best to just multiply it so that it becomes a whole integer.
Posted: Fri Oct 11, 2019 8:46 am
I think it would be better to multiply the faction in order to get an integer.
Posted: Fri Oct 11, 2019 11:30 am
Don't leave the coefficients as fractions.
Posted: Fri Oct 11, 2019 12:12 pm
The coefficients should always be whole numbers even at their empirical formula notation. Just make them whole numbers, if anything at least at that point you would have gotten your molecular formula. Hope this helps.
Posted: Fri Oct 11, 2019 1:08 pm
I remember Prof. Lavelle suggesting that we should convert the fractional stoichiometric coefficients into whole integers.
Posted: Fri Oct 11, 2019 1:12 pm
It should always be expressed as a whole number. However, during the thermodynamics units, it would be beneficial to leave it as a fraction, but for now just express them as whole numbers.
Posted: Wed Nov 13, 2019 5:14 pm
I would convert it to an integer as the TAs always change it and they are the ones that grade the tests and homework.
Posted: Wed Nov 13, 2019 5:24 pm
I would always change it to an integer because it gives an accurate answer
Posted: Sun Nov 17, 2019 10:38 pm
its useful to use fractions in the process of figuring it out then multiplying the whole equation (both sides) by a least common denominator.