posted by Stacey on .
A baker uses sodium hydrogen carbonate as the leavening agent in a banana nut quickbread. the baking soda decomposes according to two possible reactions. 1. 2 NaHCO3 = Na2CO3+H2O+CO2
2. NaHCO3+H=H2O+CO2+Na. calculate the volume in mL of CO2 that forms at 180 degrees C and .975 atm per gram of NaHCO3 by each of the reaction processes. if you could show me an example thatd be great i just can't seem to get it to wokr out right
Use the first equation.
2NaHCO3 ==> Na2CO3 + H2O + CO2
The problem gives you 1.0 g NaHCO3 (or 1.0 g Na2CO3 for the second part). Convert 1.0 g NaHCO3 to moles. moles = grams/molar mass.
Using the coefficients in the balanced equation, convert moles NaHCO3 to mole CO2.
mols NaHCO3 x (1 mole CO2/2 mole NaHCO3) = moles NaHCO3 x (1/2) = xx
Use PV = nRT. You know P, n, R, and T. Solve for V which will be in L, then convert to mL.