Метановая (муравьиная) кислота дает реакцию "серебряного зеркала", а этановая (уксусная) не дает. НСООН + 2 [Ag(NH3)2]OH > 2 Ag↓ + 4 NH3 + H2O + H2CO3. Обычно когда в реакциях образуется угольная кислота H2CO3, ее обычно не пишут, а пишут СО2 + Н2О, так как угольная кислота очень легко распадается на воду и углекислый газ. Я специально написал именно H2CO3, чтобы показать, что первичным продуктом окисления метановой (муравьиной) кислоты является именно угольная кислота. Но если хочешь, то можешь H2CO3.не писать, а сразу написать СО2 + Н2О.
A Weekday Yesterday I woke up at seven and as always got up once. I began my day with my morning exercises. It took me half an hour to do them. Then I took a shower and shaved, dressed and did my hair. After that I had breakfast. Then I took my dog out for a short time. I left the house at nine o'clock and walked to the underground station. It took me twenty minutes to get to the office by underground. Work began at half past nine. I looked through the morning mail and answered the letters and faxes. Then I discussed various problems with my colleagues. Our lunch broke at one, and we all went to the canteen. I had a light lunch, so it didn't take long, and I had enough time to have a smoke and talk to my friends before work began again. A lot of people rang me in the afternoon, and my secretary often asked me to answer the calls. That kept me busy till half past four, when I had a tea break. After that I held a short meeting with my colleagues, and we discussed our plans for the next day. I finished work at six, and a friend drove me to the park, where we had a game of tennis. I'm quite good at tennis, so I taught him to play. We went home together because we live near each other. that was my yesterday.
