Day 121

pH;  the negative of the common ( base = 10 ) logarithm of the hydronium ion concentration.  
kw;  the product of hydronium and hydroxide ions ( ionization constant of water )

p.505  # 1-4

1.  hydronium = 10 to the -7   hydroxide = 10 to the -7
2.  To describe the acidity and basicity of solutions that are not too far from neutral.  
3.  Because the is an equal amount of hydronium and hydroxide ions.

4a) Acidic
b) Acidic
c) Acidic
d) Basic

p. 517 # 4

4a) pH;  the negative of the common ( base = 10 ) logarithm of the hydronium ion concentration.  
b)
c) The common base that each number has.  ( in the pH scale the base is 10 )