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2015-05-25T11:28:34+05:30
1. Morning we brush our teeth.Since we eat sugary foods, bacteria act upon it producing weak acids which weaken the gums of teeth. Hence to neutraize it, we brush our teeth with paste which is a weak base. 
Any dil. acid+Mg(OH)2-------> salt + H2O 
2.
We use vinegar(acetic acid) to wash the materials since they are oxidised. 
CH3COOH+FeO--------->CH3COOFe+H2O
3.The process of rusting

Fe+3O2+xH2O------------->Fe3O4.xH2O 
4.P
hotosynthesis in plants 
6CO2+6H2O--------->C6H12O6 (aq) + 6O2 (g) 
5.
When 1 Re coin are exposed to air for long time, black sulpides are formed. 
Ag+S--------->AgS
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