Chapter 6 Key Concepts

Question 1

Anomalous properties of water 1

Answer 1

Ice is less dense than water

• h bond holds water molecules further apart in an open lattice tetrahedral structure full of holes decreasing density . Bond angle abound the h involved is like 180
• when lattice collapse they move closer together again
• making insulating layer
• presents water from freezing
• each h2o can make 4 h bonds

Question 2

Another anomalous property of water

Answer 2

• high surface tension
• viscosity allowing insects to walk on water
• detergents decrease the surface tension making water wetter
• high boiling point cuz bare energy needed to break h bond. Without h bond water boil at -75 no liquid water so no life as we know it as it would be gas at room temp. When water boils h bonds break completely