Chem I Friday Test - Water & Aqueous Solutions

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

Tags

NGSS.MS-PS1-1

What is the chemical formula of water?

• H2O

• CO2

• O2

• N2

Tags

NGSS.MS-PS1-1

Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
• The molecule has two poles, at which the it is colder than other regions of the molecule.
• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
• The water molecule is neutral.

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Which term refers to water having a slightly positive and a slighty negative charge on its ends?

• cohesion

• surface tension

• polar

• adhesion

The hydrogen atoms in a water molecule are ________________ charged.

• not

• negatively

• neutrally

• positively

Tags

NGSS.MS-PS1-1

A Compound that is being dissolved is called a

• Solution
• Solute
• Solvent
• Suspension

Tags

NGSS.MS-PS1-2

A solvent is...

• substance into which the solute dissolves
• a compound being dissolved
• a substance that does not dissolve
• None of the above

Surface tension is the property of water in which...

• water molecules at the surface tend to stick together.

• water spills easily.

• water tends to be see-through.