TBR electroplating passage (ch 10, passage 14)

[brrenters]

Advertisement - Members don't see this ad

Hi all,

Was wondering about the BR gen chem ch 10 passage 14, question #90. The passage states that solution 4 ends with a lower mass than solution 1, yet the answer key chose the graph with solution 1 ending in a lower mass than solution 4. I was wondering if anyone else was confused by this. Perhaps the answer key is mistaken?

http://img266.imageshack.us/img266/2460/photounz.jpg

 

[brrenters]

Another question I had an issue with was #92. I chose answer D, thinking that a good choice would be a metal that would be preferentially oxidized as a sacrificial metal due to the discussion in the chapter. However, the answer is A. What scenarios do sacrificial metals apply to?

 

[Mornhavon]

.