Chemical Equilibrium Homework

Due 13-April-1995

Each person has a different system; consult list later on this page for yours. You can find ionization constants in various books. A good source is the Chem Rubber Handbook that has the official name "Handbook of Chemistry and Physics". You are encouraged to work in pairs.

  • 1. Graph logarithm of concentration versus pH. Automatic deduction of one point if you write PH or Ph.
  • 2. Use colors or a code to designate lines. If drawn on a black and white printer, use color or a highliter to show each species.
  • 3. Graph concentrations of all species including H+ and OH¯ .
  • 4. Estimate concentrations of all species at pH 6 and write on back of graph. Convert to concentration (do not report as - log of concentration). 
    Initial of Last Name		System
	A		0.003 M H3PO4
	B		0.0007 M H3PO4
	C		0.0009 M H3PO4
	D		0.001 M acetic acid and 0.0005 M oxalic acid
	E		0.002 M acetic acid and 0.0001 M oxalic acid
	F		0.001 M acetic acid and 0.0005 M malic acid
	G		0.001 M acetic acid and 0.0005 M carbonic acid
	H		0.0002 M acetic acid and 0.0007 M oxalic acid
	I		0.001 M acetic acid and 0.0005 M H2S
	J		0.0004 M ammonium hydroxide
	K		0.0003 M phenol
	L		0.0004 M acid with pK1 = 4.7 and pK2 = 8.3 with 0.0005 M acetic acid also
	M		0.0003 M acetic acid and 0.0005 M oxalic acid
	N		0.001 M acetic acid and 0.00005 M oxalic acid
	O		0.00001 M acetic acid and 0.0005 M oxalic acid
	P		0.0002 M acetic acid and 0.0001 M oxalic acid
	Q		0.001 M acetic acid and 0.0005 M oxalic acid
	R		0.001 M chloracetic acid and 0.0005 M oxalic acid
	S		0.003 M acetic acid and 0.0003 M oxalic acid
	T		0.003 M citric acid
	U		0.0007 M citric acid
	V		0.0002 M citric acid
	W		0.0003 M citric acid
	X, Y, Z		0.0001 M acetic acid and 0.001 M citric acid