¢.
(볿) .
.
˲ 1.
8-10 - 2-3 볿. , . .
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2.
0,5 3 볿 4 3% . . - . 2 3 , , . . .
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3
:
1.
˳. (-2) .
1 3 2-3 , 2-3 10% . () , .
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2.
ճ .
23 12 2 H2SO4 12 0,1 KMnO4; 23 1 ; 45 2 . . 12 0,1 (). .
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3.
ճ .
23 15% . 23 10% 23 2% CuSO4; 12 5 % , , 56 5 % . .
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4
: