Sapling Learning Map For the following reaction between Mohr\'s salt (ron as FeS

Question

Sapling Learning Map For the following reaction between Mohr's salt (ron as FeSO4(NH4SO 6H20) and potassium dichromate (dichromate as K2Cr20), determine the volume (in milliliters) of a 0270 M solution of Mohr's salt that is needed to fully react with 0.0500 L of 0.270 M potassium dichromate. (The reaction is shown in its ionic form in the presence of a strong acid.) Number Mohr's salt volume = 240 mL For the same reaction, what volume (in ililiers)of 0.270 M potassium dichromate is required to fully react with 0.0500 L of a 0.270 M solution of Mohr's salt? Number 1 mL potassium dichromate volume-l Incorrect Eri O Previcus Give Up & View Soluton # Try Again O Next r Explanation

Explanation / Answer

From the equation :

1 mole of Pottasium dichromate reacts with 6 moles of Mohr salt

Moles of pottasium dichromate = Molarity *Volume in L = 0.27*0.05 = 13.5*10^-3

Moles of Mohr salt = 13.5*10^-3 *6 = 0.081

Moles = M*V = 0.27*V = 0.081

V = 0.3 L = 300 ml of Mohr salt

Part b

Moles of Mohr salt = MV = 13.5*10^-3

Mohr salt : Pottasium dichromate = 6:1

Moles of Potassium dichromate needed = 13.5*10^-3 / 6 = 2.25*10^-3

0.27*V = 2.25*10^-3

V = 8.33 ml of POttasium dichromate required

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