Question

The graph shows the porosity and expansion of plaster with respect to water content. At what temperature, the reaction would occur? 60% 0 30% 50% Expansion 0.25% Porosity of Plaster in % 40% 0,20% Linear Expansion of Plaster Porosity 30% 0,15 20% 0.10% 90 yoo BO 50 Water: Plaster Ratio 40 (А) 373 К Mathew (В) 673 К 276 K (D) 573K​

Answer 1

Answer:

On mixing with water, plaster of paris takes up water of crystallization to form orthorhombic calcium sulphate dihydrate. This sets to a hard mass which is monoclinic calcium sulphate dihydrate or gypsum. This is the final product of setting of plaster of paris. Its composition is CaSO

4

⋅2H

2

O.

Answer 2

Answer:

373k

Explanation:

at 373k gypsum will start heating, it will loose water molecules and become plaster of paris.