metals and reactivitity series 2

Question 1

Thermal decomposition

Answer 1

Breakdown compound by using heat energy

Question 2

what do highly reactive metals form

Answer 2

stable compounds that resist that resist decomposition

Question 3

what metal does highly reactive compounds stop at

Answer 3

calcium. it can decompose

Question 4

how to find amount of oxygen reacted with Mg

Answer 4

1. measure 2 g of Mg by using balance
2. burn into cruciblr and cover with lid to avoid spitting
3. remove lid from time to time to allow oxygen in
4. measure mass after burning then burn again and measure mass
5. repeat previous step until you reach constant mass whic means reaction is done
6. final mass into crucible - inital mass = mass ofoxygen

Question 5

what is extracted by electrolysis

Answer 5

metals that are more reactive than carbon

metals starting from aluminum and up in reactivity series

Question 6

what is reduced by carbon and why not electrolysis

Answer 6

metals less reactive than carbon

metals starting from zinc and down in reactivity series
why?
less expensive than electrolysis. (Cu, Ag, Au) found uncombined in nature

Question 7

what are the three ores in reactivity series

Answer 7

1. Aluminum ore is Bauxite Al2O3 is extracted by electrolysis

2.zinc ore is zinc blende ZnS extracted by reducing with carbon.

3. iron ore is hematite Fe2O3 extraced by reducing with carbon