C4 Acids, metals and electrolysis Flashcards
What is oxidation?
Oxidation is the loss of electrons.
What is reduction?
Reduction is the gain of electrons
Complete this word equation
Metal + acid –> salt + ________
Hydrogen
_____ reactions involve both oxidisation and reduction. What is the missing word?
redox
What is a base?
A substance with a pH greater than 7.
What is an Alkali?
A base that is soluble in water
Metal + water –> _____ _________
Metal Hydroxide
In Electrolysis of ionic solutions, if the positive ions (metals) are more reactive than hydrogen, what is produced?
Hydrogen
In Electrolysis of ionic solutions, if the positive ions (metals) are less reactive than hydrogen, what is produced?
The metal
In Electrolysis of ionic solutions, if the negative ions are halogens, what is produced?
The halogen
In Electrolysis of ionic solutions, if the negative ions are not halogens, what is produced?
Oxygen
In Electrolysis of ionic solutions, if the negative ions are not halogens, what is produced?
Oxygen
