Help with Uni chem (1 Viewer)

[Cab31]

Hey there,

i was just wondering if anyone could help me with these questions (i am in first year of Uni and we did our first prac for chem the other day):

given that aspiriin (acetyl salicylic aciid) is an acid that readily reacts to form salts, suggest what might be the difference between aspirin and soluble aspirin?

and

Given that soluble aspirin tablets contain citriic acid anf sodium carbonaate, what is the fizz associated when soluable asprin is dissolved in water?

Any help would be GREATLY appreciated!

thanks

 

[xiao1985]

soluable asprin i suppose u mean soluable in water?!

soluable in water means u need it to be charged... (ie, lost its proton)... so a soluable asprin should be the soln which is treated with base or buffer of some sort...

fizz = carbonate react with acid... releasin CO2

 

[Cab31]

thanks heaps. Is it the citric acid it is combining with...or the aspirin?

 

[xiao1985]

thanks heaps. Is it the citric acid it is combining with...or the aspirin?

maybe both in fact...since both are acidic in nature...

tho if asprin is soluable, it's most probable that it's being deprotonated (ie lost its proton) which makes it no logner acidic... hence i'd say citric...