A.

1. NaHCO3 + CH3COOH -> CO2 + NaCH3COO + H2O    (COMBUSTION REACTION)
2. Ca + 2H2O -> Ca(OH)2 + H2   (SINGLE REPLACEMENT REACTION)
3. 4HO -> O2 + 2H2O    (DECOMPOSITION REACTION)
4. CaCl2 + Na2CO3 -> CaCO3 + 2NaCl   (DOUBLE REPLACEMENT REACTION)

B.

The most powerful learning moments were when the children were really engaged and liked the things that they were being taught. It showed me how much more effective things can be taught when it is fun and enjoyable. One of the most interesting discoveries I made while working with the younger students was that a lot of them are very smart. Many people might underestimate the intelligence of these young students, but this was completely proven wrong over the time I worked with them. They also to be very curious and content about everything. Now, the part of this shared learning experience that I very much enjoyed was that they all listened to you very well. When you were teaching them how to do things, they were very disciplined and kind. Overall, this day was very fun and I hope to do something like this again.