8предложений описание своей комнаты на

Ihave large and beautiful room. she is big and cousy. there are different paints on the wall. also there is bed near the window. there is table in front of the bed. the computer is on it. there is large brown carpet on the floor. i very like my room because she is perfect place for child.

My room is very clean and light. there is my bad and table. i like a green, therefore, it is filled it. windows are large with purple curtains. a carpet looks very good, it is blue with green pattern. i like my room,however,it is tiny. recently,i have bought a new computer. it really fine suit to my room.

buffer solutions, depending on their composition, are divided into 2 main types:

acidic and basic.

acid buffering systems are usually formed by a weak inorganic or

organic acid and a salt of the same acid with a strong base.

for example:

1) ch3cooh + ch3coona - acetate buffer

weak acid salt acid

2) h2co3 (h2o + co2) + nahco3 - hydrocarbonate or

weak acid salt acid bicarbonate buffer.

basic buffer systems are formed by weak inorganic or

organic base and a salt of this base with a strong acid. for example:

1) nh3 · h2o (nh4oh) + nh4cl - ammonia buffer

weak base salt

2) c2h5 – nh2 + c2h5nh3cl - ethylamine buffer

weak base salt

basic buffer systems are formed by weak inorganic or

organic base and a salt of this base with a strong acid. for example:

1) nh3 · h2o (nh4oh) + nh4cl - ammonia buffer

weak base salt

2) c2h5 – nh2 + c2h5nh3cl - ethylamine buffer

weak base salt.