Science

TYPES OF CHEMICAL REACTIONS

Combination(A+B→AB)

Decomposition(AB→A+B)

Single Displacement(A+BC→AC+B)

Double Displacement(AB+CD→AD+BC)

Combustion(Cx Hy+O2→Co2+H2O)


HOW DO YOU KNOW A CHEMICAL REACTION HAS TAKEN PLACE?

  • Change in colour

  • Smell

  • Bubbles/fizz

  • Temperature change

  • Change of state


WHAT IS CARBONATE?

Salt of a carbonic acid


GENERALLY WORD EQUATION FOR CARBONATE REACTION?

The word equation is:

Acid+carbonate→salt+water+carbon dioxide


WHICH METAL IS THE LEAST REACTIVE?

Gold is the least reactive metal


WHAT IS A NUGGET?

A pure lump of a precious metal


WHAT ARE THE PRODUCTS FORMED IN A REACTION WITH A METAL AND ACID?

A salt and hydrogen are the products


WHAT IS AN EXAMPLE OF OXIDATION IN A EQUATION?

‘metal’+oxygen→’metal’oxide


WHAT IS PRECIPITATION?

A reaction in which substances in a solution are mixed and an insoluble product is made


MODULES TO DESCRIBE A CHEMICAL REACTION

Sodium is in column 1 so it has 1 electron and has space for 7 hands because it need 7 more to get to 8


WHAT IS THE CONSERVATION OF MASS?

You cant create or destroy atoms