IRON

Question 1

IRON AND STEEL (…) TO MAKE RUST

Answer 1

CORRODE

Question 2

OTHER WORD TO SAY IRON CORRODES EASILY

Answer 2

IT RUSTS

Question 3

WHEN DOES RUSTING HAPPEN

Answer 3

WHEN THE IRON IS IN CONTACT WITH BOTH OXYGEN (FROM THE AIR) AND WATER

Question 4

THE CHEMICAL REACTION THAT TAKES PLACE WHEN IRON CORRODES IS AN (…) REACTION

Answer 4

OXIDATION

Question 5

WHAT HAPPENS IN AN OXIDATION REACTION WITH IRON

Answer 5

THE IRON GAINS OXYGEN TO FORM IRON OXIDE

Question 6

WATER THEN BECOMES LOOSELY BONDED TO THE IRON OXIDE AND TURNS IT INTO

Answer 6

HYDRATED IRON OXIDE (WHICH WE CALL RUST)

Question 7

THE EQUATION FOR RUSTING

Answer 7

IRON+OXYGEN+WATER= HYDRATED IRON OXIDE (RUST)

Question 8

WHAT ARE THE BARRIER METHODS TO PREVENT RUSTING

Answer 8

1) PAINTING/COATING WITH PLASTIC- IDEAL FOR BIG AND SMALL STRUCTURES ALIKE (IT CAN BE DECORATIVE)

2) OILING/GREASING- THIS HAS TO BE USED WHEN MOVING PARTS ARE INVOLVED LIKE ON BIKE CHAINS

Question 9

WHAT IS THE SACRIFICIAL METHOD TO PREVENT RUSTING

Answer 9

-PLACING A MORE REACTIVE METAL WITH THE IRON SO THAT OXYGEN REACTS WITH IT INSTEAD OF WITH THE IRON (SACRIFIAL METAL=MORE REACTIVE ONE)

-ZINC FOR EXAMPLE CAN BE USED AS THE SACRIFICAL METAL (COATING OF ZINC)