Types Of Chemical Reaction Flashcards
(19 cards)
What is a redox reaction?
A redox reaction is a reaction in which oxidation and reduction occur at the same time
What is a reducing agent?
A reducing agent is the element that removes oxygen from the other
What is an oxidising agent?
The element that gives its oxygen to the other
Reduction is the —— of electrons
Gain
Oxidation is the —— of electrons
Loss
What is a half equation?
A half equation shows the change that happens to one reactant in a reaction.
What is an acid?
An acid is a substance that releases hydrant ions H+, when it is dissolved in water
What is a base?
A base is a substance that can neutralise an acid
What is an alkali?
A base that can dissolve in water. It releases OH - ions when it dissolves in water
What is the PH scale?
The PH of a solution describes its relative acidity or alkalinity
What is neutralisation?
Neutralisation is the reaction between an acid and a base or alkali to form a salt and water only
How do you predict the name of the salt formed in neutralisation?
The first part comes from the metal in the base of alkali the second part comes from the acid used
What happens in a neutralisation reaction
The H+ ions react with the the OH- ions to form H2O
What are carbonates?
Carbonates are ionic compounds that contain a carbonate ion.
What happens when a acid reacts with a carbonate?
Acid + carbonate-> salt+ water + carbon dioxide
What happens when an acid reacts with a metal?
Acid+ metal -> salt + hydrogen
What is the difference between a dilute and a concentrated acid?
A dilute acid contains a low ratio of acid to volume of solution. A concentrated acid has a high ratio of acid to volume of solution
What is the difference between strong and weak acids?
Weak acids are partially ionised ( only a small amount of their molecules release H+ ions) whereas strong acids are fully ionised ( all of their molecules release H+ ions
How is PH linked to hydrogen ion concentration?
In an aqueous solution, as the concentration of H+ ions increases by a factor of 10, the PH of a solution decreases by one
