Chemical Reactions Flashcards
What are chemical reactions?
They’re a change that makes new substances
Are chemical reactions usually reversible?
No
In a chemical reaction the starting substances are called what?
Reactants
In a chemical reaction the end substance is called what?
Product
Does the mass change in a chemical reaction?
No, the mass is the exact same among the products
What is a precipitate?
It’s the solids sometimes left in a solution
What causes precipitates to form?
Some substances in a mixture are insoluble meaning they’re left solid in the solution
What is a precipitation reaction?
In the reaction two reactants react to make a precipitate
What causes green or brown precipitates?
Iron compounds
What causes blue precipitates?
Copper
What causes light green precipitates?
Nickel
Is a precipitate the exact same as it’s reactant?
No, they usually combine with the other reactant to form a new substance first
What is oxidation?
It’s when a substance changes by the addition of oxygen
What is displacement?
It’s when a more reactive element displaces a less reactive element
