Students put 100g of vinegar into a flask. then they put 10g of baking soda into the flask. After the fizzing stops the students determine that the liquid in the flask has a mass of 105g. The students thought something was wrong. Explain what property or law made the students realize their experiment was incorrect.

Question

cuanchi · Answer

If you do the calculations you will find that are 0.12 moles of NaHCO3 in the 10 g  of NaCO3. That would produce 0.12 moles of CO2 (g) that will be lost in the air. It is equivalent to 5.28g CO2. Then if he mix 100g of vinager and 10 g of baking soda the total mass of the reaction would be 110g minus 5.28g of CO2 would be 104.72g. The problem said they got 105g. I would said is very close to the expected at leas I am missing something.

anonymous · Answer

Thank you I am more of a biology guy then chemistry so this kinda confuses me.

anonymous · Answer

well that answers my 2nd question my first is what law/property proves that 105g isn't correct