47. Решение задачи по химии №5

10. Using the data from Table 1, construct a melting diagram for the tin-zinc system.
Table 1
Zn,
% by weight 0 10 30 50 70 100
Тн, C 247 200 335 375 380 400
Тк, C 247 200 200 200 200 400

Where Тн is the temperature at which crystallization begins; Тк is the temperature at which crystallization ends.
Using the diagram for the alloy with 40% by weight Zn, determine:
1. Temperatures at which crystallization begins and ends;
2. Composition of the first crystal and the last drop of liquid;
3. Mass of Zn in the solid and liquid states upon cooling 0.5 kg of the alloy to 300 C.
On the diagram, indicate all areas and lines, the eutectic point, and give the diagram a full name.

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