Question

environments.
ve
activity: wax paper and water
drops
i - mcgraw
to do:

1. place a few drops of water on

the wax paper using the thin
pipette.

1. move the wax paper around;

lift it, move it side to side, etc.

1. what happened? draw, label

and describe on your paper
instructions for answering this
question: answer questions then
clean up the area and reset for the
next group/class.
water is polar and wax paper is
nonpolar so they dont mix
hydrogen bonds give water this
property that allowed it to move
the way it did on the wax paper
water is nonpolar and wax paper is
polar so they dont mix
electrons are shared unequally in
polar and equally in nonpolar
electrons are shared equally in
polar and unequally in nonpolar

Explanation:

• Water is polar due to unequal electron sharing (oxygen is more electronegative than hydrogen in \(H_2O\), so electrons are shared unequally). Wax paper is non - polar (hydrocarbons in wax have equal electron sharing in \(C - C\) and \(C - H\) bonds). Polar and non - polar substances do not mix.
• Hydrogen bonds in water (intermolecular forces between \(H_2O\) molecules) give water properties like surface tension. When on wax paper (non - polar), water drops maintain their shape (due to surface tension from hydrogen bonds) and can roll around without spreading out (because of the non - mixing of polar water and non - polar wax).
• Option 3 is incorrect as water is polar and wax paper is non - polar. Option 5 is incorrect as in polar molecules electrons are shared unequally and in non - polar molecules electrons are shared equally.

Answer:

• water is polar and wax paper is nonpolar so they don't mix
• hydrogen bonds give water this property that allowed it to move the way it did on the wax paper
• electrons are shared unequally in polar and equally in nonpolar