2.1.5 redox Flashcards
What is the rule for oxidation number of elements?
The oxidation number is always 0 for elements.
What are the rules for oxidation number of compounds and ions?
Oxygen- -2
Hydrogen- +1
Florine- -1
Group 1 elements- +1
Group 2 elements- +2
Group 7 elements- -1
What are the special cases for oxidation number in compounds and ions?
Hydrogen in metal hydrides- -1
Oxygen in peroxides- -1
Oxygen bonded to Florine- +2
What is the sum of all oxidation numbers?
The total charge.
Why are roman numerals used when naming compounds?
Roman numerals show the oxidation state/number of the element without a sign.
What is a redox reaction?
Redox reactions involve both reduction and oxidation.
What is reduction and oxidation (redox) ?
Reduction is the gain of electrons and oxidation is the loss of electrons.
What is reduction and oxidation in terms of oxidation number?
Reduction is a decrease in oxidation number and oxidation is an increase in oxidation number.
What is the reaction between a dilute acid and metal?
Dilute acid + metal —> salt + hydrogen
