How to solve the questions on solutes and heat capacity/enthalpy in the professional knowledge section of 2016?
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Is what is present in small amounts in the solution the solute? I forgot the questions on heat capacity and enthalpy, but I’m not sure if I got them right
I’m in a similar tricky situation as well: I scored 148 points on the professional knowledge exam back in 2014. This year, I was careless during the retake – I didn’t study the book provided by the association carefully enough. As a result, for more than 5 of the knowledge-based questions in the afternoon session, I wasn’t able to find the answers in that book. Additionally, some of the questions were beyond my capabilities, such as those related to GC1 and D2Q, as well as questions concerning the installation spacing of pumps; there were no appropriate standards provided for these, so I couldn’t answer them either. Therefore, I think I’ll fail due to my performance in the professional knowledge section this time.
I think for the question about solutes, only options ABC should be chosen; it seems rather arbitrary to say that the component lacking in option D’s solution is the solute
This is easy to understand; for example, in a 60% sulfuric acid solution, sulfuric acid remains the solute, while water, being present in smaller amounts, continues to act as the solvent.
This is easy to understand; for example, in a 60% sulfuric acid solution, sulfuric acid remains the solute, while water, being present in smaller amounts, continues to act as the solvent.
Well, I thought the same thing. Some friends said that A, B, C, and D are all correct, which led to my doubts
Is the answer for ethanol and water correct as well? The concepts of solutions and liquid mixtures are different, right? D is even worse; it makes no sense.
That alcohol solution… damn it, why do I still think alcohol is the solute? I didn’t choose it in the end
I just checked; in an alcohol solution, no matter what the concentration of alcohol is, it remains a solute. So the answer to that question is BC, right?
It means that ethanol is soluble in water; it’s always an aqueous solution of ethanol. Is water necessarily the solvent?
To be honest, solvent and solute are relative terms; the person who came up with this question is simply being nonsensical. Strictly speaking, none of the answers are correct.