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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: amiller80 on March 02, 2019, 08:24:41 PM

Title: Calculating mass of an element in a reactant based on the moles of Product
Post by: amiller80 on March 02, 2019, 08:24:41 PM

This is my first post so please bash me if I format something wrong.

This is Experimental Chem/Principles of Chem if that helps.

Use the moles of CO₂ produced to determine the mass (g) of carbon present in NaHCO₃.

Moles of CO₂: 6.90x10^-5
Mass of reactant (NaHCO₃): 0.0864 g

Overall Equation: NaHCO₃(s) + H₂SO₄(aq) ➞ H₂O(l) + CO₂(g) + NaHSO₄(aq)

I would think that since the mol ratio of CO2 and NaHCO3 is 1:1, then 6.90x10^-5 moles of carbon is present in NaHCO₃ and then just use the molar mass of C to determine the mass in grams. Right?

Title: Re: Calculating mass of an element in a reactant based on the moles of Product
Post by: AWK on March 03, 2019, 02:45:57 AM

In this way, you will get carbon content in CO₂. Correct.

But your data shows that the sample contains less than 10% pure NaHCO₃.