Question

the slight negative charge at one end of one water molecule is attracted to the slight positive charge of another water molecule. what is this attraction called?
a a hydrogen bond
b a covalent bond
c an ionic bond
d a hydrophilic bond
question 2 (4 points)
one of waters unique properties is that it has strong surface tension. what do you predict would happen if water had weak surface tension?
a insects would not be able to land on or walk on water
b plants would not be able to draw water from the ground through their roots
c water molecules would attract each other
d water would only be able to dissolve non - polar substances
question 3 (4 points)
which property of water explains how water droplets are absorbed by a paper towel?
a waters adhesion to other types of molecules
b waters high specific heat
c waters high surface tension
d waters buffering capacity

Explanation:

1. Hydrogen bonds occur when a slightly negative - charged atom in one molecule is attracted to a slightly positive - charged atom in another molecule. In water, this is due to the polarity of water molecules. Covalent bonds are sharing of electrons within a molecule, ionic bonds are between ions, and 'hydrophilic bond' is not a standard bond type.
2. Strong surface tension in water allows insects to walk on water. If water had weak surface tension, insects would not be able to land or walk on water. Water's ability to be drawn up by plants is due to cohesion and adhesion, water molecules already attract each other due to hydrogen bonds, and water's ability to dissolve substances is related to its polarity, not surface tension.
3. The property of water that explains how water droplets are absorbed by a paper towel is water's adhesion to other types of molecules. High specific heat is related to temperature change, high surface tension is related to the behavior of water's surface, and buffering capacity is related to maintaining pH.

Answer:

1. a. A hydrogen bond
2. a. Insects would not be able to land on or walk on water
3. a. Water's adhesion to other types of molecules