For the following reaction between Mohr\'s salt (iron as FeSO_4(NH_4)_2SO_4 6H_2

Question

For the following reaction between Mohr's salt (iron as FeSO_4(NH_4)_2SO_4 6H_2O) and potassium dichromate (dichromate as K_2Cr_2O_7). determine the volume (in milliliters) of a 0.290 M solution of Mohr's salt that is needed to fully react with 0.0300 L of 0.290 M potassium dichromate. (The reaction is shown in its ionic form in the presence of a strong acid.) For the same reaction, what volume (in milliliters) of 0.290 M potassium dichromate is required to fully react with 0.0300 L of a 0.290 M solution of Mohr's salt?

Explanation / Answer

from this reaction it is clear that for one mole of Cr3O7 required 6 moles of mohrs salt

both concentrations are same so

6 x 0.03 L

= 0.18L

= 0.18 x 1000

= 180 mL

2)

0.03/6

= 0.005 L

= 0.005 x 1000

= 50 mL

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