1.
What volume in litre of 0.1N0.1\,\text{N} K2Cr2O7\mathrm{K_2Cr_2O_7} solution should be taken to have 1 equivalent of K2Cr2O7\mathrm{K_2Cr_2O_7} in a reaction where it is reduced to Cr3+\mathrm{Cr^{3+}}?