306ColligativeProperties2

306ColligativeProperties2 - Freezing point depression (DTf)...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Lesson 15 1 Lesson 15 Freezing point depression ( D T f ) Lesson 15 Freezing point depression Lesson 15 Freezing point depression • An equation similar to the one used to calculate boiling point elevation ( D T b ) is used for freezing point depression ( D T f ): D T f = – iK f m • Notice that K f depends only on the solvent type.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lesson 15 2 Lesson 15 Lesson 15 Example 1 What weight of ethylene glycol (C 2 H 6 O 2 ) must be added to 1 000 g of water to lower the freezing point to –10 °C? Data : K f = 1.86 K/ m Lesson 15 Example 2 The freezing point depression constant for HgCl 2 is 34.3 K/ m *. For a solution of 0.849 g of mercurous chloride (empirical formula HgCl) in 50 g of HgCl 2 , the freezing point depression is 1.24 °C. What is the molecular weight of mercurous chloride? What is its molecular formula? * m is molality
Background image of page 2
Lesson 15 3 Lesson 15 Example 3 The freezing point depression of a 0.10 molal solution of HF(aq) solution is –0.201 °C. Calculate the percentage dissociation of HF(aq). Lesson 15
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

306ColligativeProperties2 - Freezing point depression (DTf)...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online