Question

which of the following explains the formation of the curved surface water in the graduated cylinder shown below?

Answer 1

A. Hydrogen bonds form between water molecules.
B. Ionic bonds form between glass molecules in the cylinder.
C. Covalent bonds form between water molecules and glass molecules in a cylinder.
D. Attractive forces form between polar water molecules and polar glass molecules in the cylinder.

Answer 2

@InYourHead

Answer 3

can you help

Answer 4

Water molecules are "polar."

That means that they have a positive charge on one end,
and a negative charge on the other end.

Here's a picture of a water molecule:
http://www.marietta.edu/~biol/biomes/physmol.gif

Graduated cylinders are made of glass.
And the glass molecules are ALSO polar.

Polar molecules easily stick to one another.

So, the water molecules and glass molecules are attracted to one another.
They stick.

This makes it so that the top of the water, inside the cylinder, is curved,
because the water molecules are sort of "climbing" up the sides of the glass cylinder.

Answer 5

You've read my explanation right? Yeah it's D.

Answer 6

Some people might have said C.

The thing is...water and glass don't form covalent bonds.

Answer 7

okay thank you @InYourHead