2.3 Water Chemistry

Front

Pure water is made of how many hydrogen (H) atoms and how many oxygen (O) atoms?

Back

2 hydrogen (H) atoms and 1 oxygen (O) atom

Front

What is the chemical formula for a single molecule of water?

Back

H2O

Front

Molecules like water stay together because the ______ are bonded.

Back

atoms

Front

Covalent bonds mean atoms are sharing ______, the negatively charged particle in an atom.

Back

electrons

Front

Does Hydrogen (H) have a single electron?

Back

True

Front

Pure water is made of how many hydrogen (H) atoms and how many oxygen (O) atoms?

Back

2 hydrogen and 1 oxygen

Front

What is the chemical formula for a single molecule of water?

Back

H2O

Front

pH, a measure of acidity, is based on the number of free ________ (H) or ________ (OH) molecules in a substance.

Back

hydrogen, hydroxide

Front

Can free hydrogen atoms or oxygen bonded with only one hydrogen (called hydroxide) change pH?

Back

True

Front

What does a charge (such as + or -) on an atom or molecule indicate?

Back

An imbalance in the number of protons and electrons.