Molarity, Acid Base

  1.     What is the molarity of a solution prepared by dissolving 15.0 g of sodium hydroxide in enough water to make a total of 225 mL of solution?

   2.     What is the pH of a 10 ^{- 3} M solution of HCl?

3.    Identify the following compounds as Acids (A) or Bases (B) or Neutral pH (N)

a)     HCl ______

b)    NaOH ______

c)     H₂SO₄ ­______

d)    A substance that dissociates in H⁺ and a F^-______

e)     A substance that once dissolved in water releases OH^-  ______

f)     A compound that lowers the pH of a solution ______

g)     A compound that increases the pH of a solution ______

h)    A proton donor ______

i)      A proton acceptor ______
j) A substance with a pH higher than the blood _______
k) A sustance with pH equal to distilled water  _______
l) A substance with pH equal to gastric juice ________
M) A substance with pH equal to pancreatic juice _______

Answers

Chemical Reactions

1.     Classify the following chemical reactions as Synthesis (S), Decomposition (D), Combustion (C), Single displacement (SD), or Double displacement (DD).

a)      2 H₂O → 2 H₂ + O₂ ________

b)     8 Fe + S₈ → 8 FeS ________

c)      AgNO₃ + NaCl → AgCl + NaNO₃ ________

d)      Zn + H₂SO₄ → ZnSO₄ + H₂ ________

               e)      CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(g) ________


2. Complete and balance (if necessary) the following chemical equations 

a) ________C₆H₁₂O₆ + ________O₂    à   _________+ _________H₂O


b) ______C₇H₁₄ + ______O₂    à   _______CO₂ + ___________








Answers