If a product contains sodium hydrogen carbonate, how could i test it for the presence of sodium bicarbonate?
Answer:
Add a couple drops of dilute acid to the sample (dil HCl)
HCl(aq) + NaHCO3(s) --> NaCl(aq) + CO2(g) + H2O(l)
you will see bubbles
Dave's right, AND if it's there in appreciable amounts (and aqueous) you can titrate it with a weak acid and watch for the pKa of HCO3(-) and CO3(2-) in the titration curve...tho' that's iffy...
Mix it with vinegar. If the vinegar fizzes, the product contains carbonate or bicarbonate.
They are the same chemical NaHCO3 and sodium bicarbonate. I guess the best way would be using ion chromatography. Got Ion Chromatograph? Prolly not.
It would depend on what else is present in the product but they are indeed the same compound. I agree with DaveP however what I would do to get a more conclusive test is this. Add 1mole of sodium bicarbonate to one mole of hydrochloric acid and indeed it will evolve gas(CO2). Allow the reaction to go to completion, totally. Then there will be NaCl in water remaining. Then I would add some silver nitrate to precipitate white curdy silver chloride to ensure that what you started with was sodium bicarbonate(ie work backwards)
Another test you could do is to dissolve the sodium bicarbonate in water and just add some silver nitrate and if carbonate is present then you will get a precipitate of silver carbonate. Also put a torch to the sodium bicarbonate and the presence of a yellow flame will indicate the presence of sodium.
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