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IB Biology | Year 1 (Junior) · Water · part 1/6

Hydrogen Bonds in Water in 7 Min (6 Marks)

Hydrogen Bonds in Water in 7 Min (6 Marks)

Why water is the medium for life, why the water molecule is polar, and how hydrogen bonds form between water molecules. Includes a six mark exam-style question with a drawing, solved step by step. Part 1 of 6 on IB Biology A1.1 Water, for SL and HL.

In this lesson

  1. 0:00 The question
  2. 0:15 Warm-up
  3. 0:52 Water as the medium for life
  4. 1:40 Polar covalent bonds
  5. 2:39 Hydrogen bonds
  6. 3:37 Practice: draw
  7. 4:57 What earns the mark
  8. 5:35 Exam question solved
  9. 6:30 Recap
  10. 6:53 Next Tuesday
Answers to the practice questions at the end of the video
  1. A polar covalent bond [1].
  2. Oxygen attracts the shared electrons more than hydrogen, so the electrons are shared unequally [1]; oxygen has a small negative charge and each hydrogen has a small positive charge [1].
  3. Four [1].

Questions are original, in the style of the exam; marks are estimates.

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