Solid sodium bicarbonate and acetic acid were reacted in an open flask as follows:
NaHCO3 (s) + CH3COO(aq) + H20(l) + CO2 (g)
The following data was recorded:
Time(s) Mass of Flask and Contents(g)
0.00 203.00 g
30.0 202.95 g
60.0 202.93 g
90.0 202.92 g
Calculate the overall rate of reaction in grams of NaHCO3 per minute.
(203.00 was on the scale )
Kinda at a lost with this chemistry, Can someone please help me? (Picture below)?
2016-06-17 6:06 pm
回答 (1)
2016-06-17 7:34 pm
The balanced equation is actually:
NaHCO3(s) + CH3COOH(aq) --> CH3COO-(aq) + Na+(aq) + CO2(g) + H2O(l)
So, the loss of mass by the flask is due to the release of CO2(g) from the solution.
Overall, the change in mass was only 0.08 g CO2 / 1.5 minute, or 0.053 g CO2/min.
Using unit conversion to get to g NaHCO3/min:
0.053 g CO2/min X (1 mol/44 g CO2) X (1 mol NaHCO3/1 mol CO2) X (84.0 g NaHCO3/1 mol) = 0.10 g NaHCO3/minute
Hope that helps....
NaHCO3(s) + CH3COOH(aq) --> CH3COO-(aq) + Na+(aq) + CO2(g) + H2O(l)
So, the loss of mass by the flask is due to the release of CO2(g) from the solution.
Overall, the change in mass was only 0.08 g CO2 / 1.5 minute, or 0.053 g CO2/min.
Using unit conversion to get to g NaHCO3/min:
0.053 g CO2/min X (1 mol/44 g CO2) X (1 mol NaHCO3/1 mol CO2) X (84.0 g NaHCO3/1 mol) = 0.10 g NaHCO3/minute
Hope that helps....
收錄日期: 2021-04-21 19:03:23
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