ES2: Redox
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
Define “oxidation”
The loss of electrons or the gain of oxygen
Is hydrogen removed or gained in oxidation?
Removed
Give the general equation for oxidation.
K===> K+ + e-
Is there an increase or a decrease in oxidation numbers during oxidation?
Increase
Define “reduction”
The gain of electrons or the loss of oxygen
Is hydrogen removed or gained in reduction?
Gained
Give the general equation for reduction.
K+ + e- ===> K
Is there an increase or a decrease in oxidation numbers during oxidation?
Decrease
What is a redox reaction?
• A reaction where electrons are being transferred - Reduction and oxidation take place simultaneously
What is a reducing agent?
A substance which donates electrons and becomes oxidised as it reduces another species
What is an oxidising agent?
A substance which accepts electrons and becomes reduced as it oxidises another species
Why do elements in diatomic molecules have an oxidation state of 0?
They haven’t accepted/donated any electrons
What oxidation state do elements in diatomic molecules have?
0
What oxidation state does fluorine have?
-1
What oxidation state does chlorine have?
-1 (except with O or F)
What oxidation state does oxygen have?
-2 (except with F or a peroxide)
What oxidation state does bromine have?
-1 (except with O, F or Cl)
What oxidation state does iodine have?
-1 (except with O,F,Cl or Br)
What oxidation state does hydrogen have?
+1 (except with metals)
What oxidation state do Group 1 metals have?
+1
What oxidation state do Group 2 metals have?
+2
What oxidation state does aluminium have?
+3
What oxidation state do compounds have overall?
0
What oxidation state do ions have?
The same as its charge