【简答题】已知在1mol?L-1HCl中,ψθFe3+/Fe2+=0.68V,ψθSn4+/sn2+=0.14V,则以Fe3+滴定Sn2+至99.9 %时的平衡电位为__________;计量点电位为__________;滴定至 l00.1 %时的平衡电位为____________;计量点前后电位改变不对称是由于____________。
【简答题】已知在酸性介质中,ψθFe3+/Fe2+=0.68V;ψθSn4+/sn2+=0.14V,则下列滴定
【简答题】完形填空。 It Seemed Like a Good Idea at the Time I really only meant it as a joke. I wasn't trying to steal anything honestly. My friend Matthew started bringing his new cell phone to class last week. He ...
【单选题】已知: (Sn 4+ / Sn 2+ ) = 0.14 V, (Fe 3+ / Fe 2+ ) = 0.77 V,则不能共存于同一溶液中的一对离子是
【判断题】教师在课堂上提问时,应避免提间过于频繁。()
【简答题】已知在1mol/L HCl介质中,已知φӨ′Fe3+/Fe2+=0.68V;φӨ′Sn4+/Sn2+=0.14V,则下列滴定反应:2Fe3+ + Sn2+ = 2Fe2+ + Sn4+到达化学计量点时的电位为___V。
【单选题】患者眼睑浮肿,逐渐蔓延至全身,为哪种水肿
【单选题】患者眼睑浮肿,逐渐蔓延至全身,为哪种水肿
【简答题】已知在1mol/L HCl介质中φӨ′Fe3+/Fe2+=0.68V;φӨ′Sn4+/Sn2+=0.14V,则下列滴定反应:2Fe3+ + Sn2+ = 2Fe2+ + Sn4+,化学计量点电位为___V。
【简答题】短文改错 I've really got to do something to lose weight because I'm getting much too fat. I wasn't worried about it until I go 1._________ to see the doctor. He told me that I'd probably had a heart 2.___...