i've been asked to explain the observation of sickle cell anaemia which is caused by a recessive point mutation in the beta chain of adult haemoglobin, but foetus homozygous recessive is not affected.
why is that? i have been told that foetus has haemoglobin gamma not beta and therefore can't...
ah okay i think i get it now. so then the less dissolved, the freezing point will only drop a little. so because some of the unknown remains undissolved/unmelted on the walls of the test tube then my calculated molar mass would be too high?
hrmm i think I'm getting bit confused with the terms lower freezing point depression and higher freezing point depression.
is lower freezing point depression a lower freezing point temperature? say freezing point of pure substance is 50 and so would a lower freezing point depression be...
this phenomenon is called super cooling? :confused: i not sure hehehe
P.S Borek, it is the "determined" molecular mass of the carboxylic acid that has doubled
if i have some of my unknown sample which remains unmelted and undissolved on the walls of the test tube, will this error cause the calculated molecular mass to be too high or too low?
i've thought about this and my guess is that the molecular mass would be too high because the colligative...