CHEMISTRY 1112

Review Quiz 1

Summer Session II 2002
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  1. Write the charge of the following cations:
    1. Na?    __________
    2. NH4? __________
    3. K?     __________
    4. Cu?   __________

 

  1. Name the following:
    1. NaCl ____________________
    2. AgBr ____________________
    3. HCl _____________________
    4. HNO3 ___________________

 

  1. What effect does added heat have on the equilibrium:

2SO2(g) + O2(g) пр 2SO3(g) + heat

 

 

     4. Consider the equilibrium: heat + 4NH3(g) + 5O2(g) пр 4NO(g) + 6H2O(g) 

   (increase,i, decrease,d, or no change,nc) The temperature and volume remain constant unless otherwise noted.

 

Change Equilibruim Value Effect
Add NO number of moles of H2O i  d  nc
Add NO number of moles of O2 i  d  nc
Remove NO number of moles of NH3 i  d  nc
Add heat number of moles of NO i  d  nc

 

 

5. Copper ion solutions appear blue to the eye. Is this the absorbed or transmitted light?

 
 

 What effect does a dirty cuvet (caused by fingerprints, water spots, or lint) have on the percent transmittance reading?

 

 

6. If the solution shows a reading of 22%T on the spectrophotometer, what is the absorbance value of the solution? [Answer:  
    A=0.66]