citric acid and sodium bicarb endothermic reaction

Hi all been asked to have this practical. What concentration of citric acid solution is needed to how much bicarb please? teacher gave me a method but it lists 25 mls of citric acid solution to 15 g of bsodium bicarb so doesnt actually tell me. TIA for those that do this,
 
we use the citric acid as a solid and then 0.1M NaHCo3 as solution. ! x spatula of citric acid in boiling tube and then 1ml NaHCo3
Works for us
 

CovTech

Lvl 37 Alchemist
COMMITTEE
We do the opposite to labmom - add solid bicarb to 1~M citric acid

15g of bicarb in 25ml of citric acid seems very excessive to me though....
 

CovTech

Lvl 37 Alchemist
COMMITTEE
how much bicarb would you use - are we talking spatulas?
Yeah pretty much
A lot of our endo/exo are liquid in liquid to 25ml a piece but the two which were powders they just lumped in

Unless you're doing it quantitatively it shouldn't matter
 
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