Phases of Matter and Mixtures
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Questions and Answers

What is the freezing point of lead in degrees Celsius?

327oC

What is the composition of the eutectic point on the phase diagram?

2.6 mass % Ag

In which region of the phase diagram does the crystallization of lead begin?

AB or BC

What is the significance of the area above the curve ABC on the phase diagram?

<p>It represents the liquid phase.</p> Signup and view all the answers

What is the process of heating argentiferous lead and cooling to get pure lead and liquid richer in silver known as?

<p>Pattinson's process</p> Signup and view all the answers

What is the point on the phase diagram where solid lead starts separating during the Pattinson's process?

<p>a'</p> Signup and view all the answers

What is the composition of the solid mixture in the region below the curve DBE?

<p>T or composition</p> Signup and view all the answers

What is the significance of the curve AB on the phase diagram?

<p>It represents the solid lead in equilibrium with liquid having a composition given by the curve.</p> Signup and view all the answers

What is the significance of the point C on the phase diagram?

<p>It represents the freezing point of silver.</p> Signup and view all the answers

What is the purpose of the Pattinson's process?

<p>To obtain pure lead and liquid richer in silver</p> Signup and view all the answers

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