蝕刻
nitric acid 有強氧化性, 會同copper 反應
Cu(s)-->Cu2+ (aq) +2e-
高濃度:
NO3- + e- +2H+ -->NO2 +H2O
較低濃度:
NO3- +3e- -->NO
平衡方程式消去e-
http://en.wikipedia.org/wiki/Nitric_acid#Etchant_and_cleaning_agent
2013-12-01 18:21:18 補充:
calcium hydroxide is sparingly soluble(難溶) in water
you put the solid Ca(OH)2 into the water
wait a while, then use filter paper to filter out the solid
then that is saturated Ca(OH)2 solution, which is limewater
飽和就是飽和, 溶到盡的溶液