NCEA level 1 Science: Shelley Dudley’s class and ions.
You have learned a lot about ions recently. How much do you remember from Friday’s lesson?
1. Reacting sodium with chlorine: electron transfer and turning atoms into ions
Electrolysis of copper chloride: turning ions back into atoms
with electrical energy supplied by a power pack.
Some questions for experts.
We talked briefly about oxidising agents. When elements burn in oxygen we say they have become oxidised.
Magnesium burning in air.
2Mg + O2 —-> 2MgO
We say that magnesium has been oxidised to magnesium oxide
Magnesium also burns in chlorine
2Mg + CL2 —-> MgCL2
Why do we say that magnesium has been oxidised to magnesium chloride?
………and some links to related chemistry.
balancing chemical equations and reactions of metals with acids