2 g (an excess) of iron is added to 50 cm3 of 0.5 M sulfuric acid. When the reaction is over, the reaction mixture is filtered. The mass of the unreacted iron is found to be 0.6 g. (Ar : Fe 5 56.) a What mass of iron took part in the reaction? b How many moles of iron atoms took part? c How many moles of sulfuric acid reacted? d Write the equation for the reaction, and deduce the charge on the iron ion that formed. e What volume of hydrogen (calculated at rtp) bubbled off during the reaction?