Gravimetric analysis of a carbonate

[g07l0989]

question
during a gravimetric anaalysis of a carbonate sample ,0.100g sample was titrated with excess acid the resultant carbon dioxide was collected in 40.0cm3 of 0.05 mol/dm3
Ba(OH)3 solution:
MCO3 + 2H=M+CO2
CO2+ Ba(OH)2=BaCO3 +H2O

Ba(OH)2 uses 22 cm3 of a 0.091 mol/dm3 HCl calculate the % of the carbonate is sample??"

well i found the number of moles of the HCl which i compared to the number of moles of BA(OH)2 by ratio the i got the number of moles of the Ba(OH)2 that was initially ther ,i then substrated that answer to from that that was titrated therefore getting the number of moles of caorbin dioxide but i don't know whether i relate the number of moles of CO2 to the M(see equation)or to MCO3.and wat i do after that to get the mass of the carbonate in the sample...please help if you can!thanks

 

[chemisttree]

You have analyzed for CO2 which exists in a 1:1 ratio to carbonate ($$CO_3^{-2}$$). Will you report the amount of carbonate as $$CO_3^{-2}$$ or as $$M^{+2}CO_3^{-2}$$. The former is straightforward but you haven't given enough information here to answer the latter.

 

[Blueshift5]

Based on the information provided, it seems that the gravimetric analysis of the carbonate sample involved titrating it with excess acid and collecting the resulting carbon dioxide in a solution of Ba(OH)3. The volume of the Ba(OH)3 solution used and the concentration of the acid were also given.

To calculate the percentage of carbonate in the sample, you will need to use the equations provided in the question. First, you need to calculate the number of moles of Ba(OH)2 used in the titration. This can be done by using the volume and concentration of the acid, as well as the equation MCO3 + 2HCl = M + CO2. Once you have the number of moles of Ba(OH)2, you can subtract it from the initial amount to determine the number of moles of CO2 produced.

Next, you will need to determine the number of moles of carbonate in the sample. This can be done by using the equation CO2 + Ba(OH)2 = BaCO3 + H2O and the number of moles of CO2 calculated in the previous step. From there, you can calculate the mass of carbonate in the sample by using the molar mass of the carbonate compound.

To determine the percentage of carbonate in the sample, you will need to divide the mass of carbonate by the initial mass of the sample (0.100g) and multiply by 100.

It is important to note that this is a simplified explanation and there may be additional steps or considerations depending on the specific experimental setup and conditions. It is always best to consult with your lab supervisor or refer to the lab manual for specific instructions and guidance.