Chapter 4
Supplemental Instruction
Iowa State University / Leader: / Kia
Course: / CHEM 177
Instructor: / Anand
Date: / February 9th, 2017

How did the test go?

Concept Check

1.  What is a solute? What is a solvent?

2.  What’s the difference between dissociation and dissolving? (correct the pun)

3.  Define:

  1. Acids
  1. Bases

4.  List the 7 strong acids

Practice Problems

5.  Of the following which are strong electrolytes, which are weak, and which are nonelectrolytes? NaCl H2O HCl CH3COOH KI NH3

6.  Predict the solubility of the following substances

  1. PbBr2
  2. Mn(OH)2
  3. CsCl
  4. Ca3(PO4)2
  5. Ag2SO4
  6. Cu(C2H3O2)2
  7. ZnS
  8. K2SO4

7.  Complete and balance the following molecular equations, then write the total ionic and net ionic for each

  1. __ HBr(aq) + __ Ca(OH)2(aq) à
  1. __ Cu(OH)2(s) + __ HClO4(aq) à
  1. __ Al(OH)3(s) + __ HNO3(aq) à

Challenge Question! – Tie it all together

8.  An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be?

KOH, NH3, HNO3, KClO2, H3PO3, CH3COOH