【简答题】The concentration of copper in a satnple of sea water is determined by anodic stripping voltammetry using the method of standard additions. When a 50.0-ml sample is yzed, the peak current is 0.886...
【简答题】There is 1000 grams of alcohol solution with the concentration of 15% inthe bottle,and now wepour 200 grams of alcohol solution A and 400 grams of alcohol solution B respectively,the concentration tur...
【简答题】Calculate the concentration of sodium acetate needed to produce a pH of 5.0 in a solution of acetic acid(0.10 mol·L -1 )at 25℃. pK a for acetic acid is 4.74 at 25℃.