Determining the Molar Mass of Carbon Dioxide
Determining the value of molar mass of chosen compound
Marta Dürrigl 1mmA
Chemical reaction:
b.) CaCO3 (s) + 2HCl (aq) ----------- CaCl2 (aq) + CO2 (g) + H2O(l)
AIM:
The aim of this investigation is to experimentally determine the molar mass of carbon dioxide (CO2) by measuring its volume and calculating its mass.
CO2 which we will measure will arise as a product of a chemical reaction between Calcium Carbonate (CaCO3) and Hydrochloric acid (HCl) as it is shown in the chemical equation above.
Once we find out the volume of the compound which molar mass we want to determine, it will be easy to calculate the number of moles by using the following formula; pV=nRT * p is pressure in Pa, * V is volume in m3, * n is molar quantity in mol, * R is gas constant of 8.314 J/Kmol * T is temperature in K.
In addition we need to find out the mass of CO2 to be able to calculate its molar mass using the second formula
M=m/n
* M is a molar mass with the measuring unit grams per mole (g/mol) * m is a mass of a compound in grams (g) * n is a number of moles(mol)
HYPOTHESIS (1):
By measuring the volume and calculating the mass of CO2 we will be able to determine its molar mass. We can predict that the molar mass of CO2 is going to be 44.01 g/mol because the molar mass (M)as a number equals the relative molecular mass (Mr) which is a sum of relative atomic masses (Ar) of all the elements in the compound. Relative atomic mass values we can find in periodic system. (Ar)of C is 12.01 and the (Ar) of O is 16. This molar mass is theoretically stated and we do not expect it to change.
HYPOTHESIS (2):
Molar mass is the ratio between mass of a compound and its number of moles. Number of moles of a gaseous compound can be determined by measuring its temperature, pressure and volume and calculated by the following expression: pV=nRT which means that n=pV/RT
In this experiment we will use the chemical reaction between
Marta Dürrigl 1mmA
Chemical reaction:
b.) CaCO3 (s) + 2HCl (aq) ----------- CaCl2 (aq) + CO2 (g) + H2O(l)
AIM:
The aim of this investigation is to experimentally determine the molar mass of carbon dioxide (CO2) by measuring its volume and calculating its mass.
CO2 which we will measure will arise as a product of a chemical reaction between Calcium Carbonate (CaCO3) and Hydrochloric acid (HCl) as it is shown in the chemical equation above.
Once we find out the volume of the compound which molar mass we want to determine, it will be easy to calculate the number of moles by using the following formula; pV=nRT * p is pressure in Pa, * V is volume in m3, * n is molar quantity in mol, * R is gas constant of 8.314 J/Kmol * T is temperature in K.
In addition we need to find out the mass of CO2 to be able to calculate its molar mass using the second formula
M=m/n
* M is a molar mass with the measuring unit grams per mole (g/mol) * m is a mass of a compound in grams (g) * n is a number of moles(mol)
HYPOTHESIS (1):
By measuring the volume and calculating the mass of CO2 we will be able to determine its molar mass. We can predict that the molar mass of CO2 is going to be 44.01 g/mol because the molar mass (M)as a number equals the relative molecular mass (Mr) which is a sum of relative atomic masses (Ar) of all the elements in the compound. Relative atomic mass values we can find in periodic system. (Ar)of C is 12.01 and the (Ar) of O is 16. This molar mass is theoretically stated and we do not expect it to change.
HYPOTHESIS (2):
Molar mass is the ratio between mass of a compound and its number of moles. Number of moles of a gaseous compound can be determined by measuring its temperature, pressure and volume and calculated by the following expression: pV=nRT which means that n=pV/RT
In this experiment we will use the chemical reaction between