Zadanie 3
Which model correctly places the partial charges within an isolated water molecule? A. Model A B. Model B C. Model C D. Model D
- Materiał graficzny
Water polarity and intermolecular attraction
Connect unequal electron sharing in water to partial charges and draw hydrogen bonds between molecules.
Tę umiejętność sprawdza 7 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 7 Otwórz w wyszukiwarce z filtrami
Zadanie 1
A model of liquid water uses a label on each oxygen atom to show the charge caused by unequal sharing of bonding electrons. Which label is appropriate? A. A full positive charge, + B. A partial negative charge, δ− C. A full negative charge, − D. No…
Zadanie 4a
(i) State the number of water molecules shown. (ii) Identify the dotted intermolecular interactions.
- Materiał graficzny
Zadanie 4b
(i) With reference to the model, explain evaporation of water from sweat. (ii) Outline why humans secrete sweat when body temperature rises.
- Materiał graficzny
Zadanie 5a
Explain how the difference in molecular polarity contributes to the thermal-property differences.
Zadanie 5c
Using the data, explain why ethane would be less suitable than water for evaporative cooling at the skin.
Zadanie 6
Water has physiological roles in both plants and mammals. (a) Outline how water’s properties allow evaporation to cool an animal. (b) Describe how weather affects the movement and loss of water in a terrestrial plant. (c) Explain how a dehydrated mammal…