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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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smokeyd smokeyd
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11 years ago
I'm doing my lab and I have a metal (K) and I have to determine whether it's bonded with a carbonate (CO3) or a bicarbonate (HCO3). If it's bonded to the bicarbonate, would the ratio be 1:1 or 1:2? If it was bonded with the plain CO3, wouldn't that make the ration 2:1 there since 2 K are needed?
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#1
11 years ago
The formulas are

KHCO3  (bi carbonate or hydrogen carbonate ) mole ratio  1:1   {K+  and HCO3-}

K2CO3 has mole ratio 2:1 { 2 x K+ and CO3 2-}
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#2
11 years ago
Yes, but are you going to have to find out with a practical test which it is?
One way would be to heat. The hydrogencarbonate would release CO2 but not the other.
 2KHCO3 ---------> K2CO3 + CO2 + H2O
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