4
, , .
- ( , 90% 10% ). .
.
1. ( 5-7 /)
1. 2 .
2. 1 . 15 .
3. . , ().
2. .
1. 2 . .
2. Na2CO3 (), , .
3. . , .
4. 1 . 15 .
5. . , .
? | |||
H2O | + | ||
H2O | + | ||
H2O | + Na2CO3 | ||
H2O | + | ||
H2O | |||
H2O + Na2CO3 | + | ||
H2O + | + | ||
H2O | + |
: