RU_KLO
Hazard to Others
Posts: 228
Registered: 12-10-2022
Location: Argentina
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Titration carbonate/bicarbonate
I found a simple method of titration of carbonate/bicarbonate, by using 0.1N H2SO4 and phenolftalein and methyl organge indicators (the ones I have)
1) titrate the carbonate/bicarbonate solution, with phenolftalein, till pink disappears.
2) take note (carbonate concentration) A
3) add methyl orange and titrate to peach color.
4) take note B
5) bicarbonate concentration B-A.
Is this method valid?
Why will first all carbonate be neutralized by acid and none of the bicarbonate (1)? Why will H2SO4 "choose" to first neutralize carbonate instead of
bicarbonate?
Thanks
Go SAFE, because stupidity and bad Luck exist.
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Bedlasky
International Hazard
Posts: 1243
Registered: 15-4-2019
Location: Period 5, group 6
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Mood: Volatile
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Yeah the method is valid.
Quote: Originally posted by RU_KLO  |
Why will first all carbonate be neutralized by acid and none of the bicarbonate (1)? Why will H2SO4 "choose" to first neutralize carbonate instead of
bicarbonate? |
CO3(2-) + H+ --> HCO3(-)
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