Question

Question 4 1 pts What is the term for the actual yield compared to the theoretical yield expressed as a percent? O percent yield O actual yield O reaction yield O theoretical yield Question 5 2 pts Identify the expected products of heating baking soda, solid NaHCO3 Gaseous H20 O Solid Na Gaseous carbon dioxide, CO2 Aqueous carbonic acid, H2CO3 Gaseous O2 Solid sodium carbonate, Na2CO3

Answer 1

Question 4

The term is percent yield. Its formula is :

Percent yield Actual yield Theoretical yield X 100%

Question 5

Heating baking soda decomposes it. The reaction is :

2 NaHCO₃ (s) = Na₂CO₃ (s) + H₂O (g) + CO₂ (g)

So, expected products are – Gaseous carbonic acid ( H₂CO₃) , Gaseous H₂O and solid sodium carbonate Na₂CO₃ .

Question 1.

While baking soda is decomposing, gas ( H₂O and CO₂) is being produced. So, when it is completely decomposed, no more gas is being produced. Hence, options 2, 3 and 5 are wrong ( since they are observations which occur while a reaction is still going on).

Na­₂CO₃ is white in colour, and it’s the final solid product. So,option 4 is wrong.

Option 1 is correct. Since gases are being produced, the water level changes continuously. When the reaction is done, no H₂O (g) or CO₂is produced, hence, the water level becomes constant.