Level 4 – H-NMR to Spectra Matching The spectra above cont…
Level 4 – H-NMR to Spectra Matching The spectra above contains integration data provided above the peaks (e.g. 2H = integration of 2) What molecule best matches the spectra above?Note: This is a real spectra, so some signals may overlap. Use integration appropriately.
Read DetailsLevel 4 – H-NMR to Spectra Matching Looking at the provide…
Level 4 – H-NMR to Spectra Matching Looking at the provided spectrum, ascribe the correct source for signal E.This question is designed to test your knowledge of chemical shifts and IUPAC naming conventions. Do not attempt to determine the splitting patterns, they have been suppressed.
Read DetailsLevel 1 – Extractions, Stoichiometry, and Solution Chemistry…
Level 1 – Extractions, Stoichiometry, and Solution Chemistry – The Classic Carbonate Example Balance the following acid/base extraction equation: __a_ Na2CO3 (aq) + __b___ RCOOH (aq) ↔ ___c__ RCOO- (aq) + ____d___ Na+ (aq) + ___e____ H2CO3 (aq) ↔ __f____ CO2 (g) + ____g___ H2O (l) (Answer Pattern: a:b c:d:e f:g)
Read DetailsLevel 2 – Melting Point Analysis – Interpreting Results A st…
Level 2 – Melting Point Analysis – Interpreting Results A student is in a chemistry lab and is conducting an experiment with the aid of a list of compounds to choose from, similar to what we did in our lab. A student is given a compound and must confirm its identity. They suspect it is benzoin based on its appearance, but must confirm it first. They go to the literature and note the expected melting point; then they begin to conduct a melting point experiment. The instruments and thermometer/sensor are calibrated correctly. They write in their notebook the following: “MP is higher than expected (+15oC compared to the ‘suspected compound’ literature value)” -and-“narrow range (1.1oC from start to finish)” What do the results of this melting point experiment most likely indicate?
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