Posted in Candle Holders & Accessories on 06/25/2003 11:01 pm by admin

When adding iron to a flask containing sulphuric acid, why must the flask be covered with a watch glass?
This is to form Iron ions. Do we add the watch glass to prevent any 'escaping', or is it because the reaction is violent?
Thanks
2Fe + 3H2SO4 --> Fe2(SO4)3 + 3H2
this reaction will produce hygrogen gas, so it is to prevent "escaping"
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