(i) Sodium chromate and iron(lI) chloride are mixed in an acidic medium. Assign oxidation numbers to all elements in the following equation, balance the equation and calculate the number of moles of Cr3* chloride produced if 15 cm³ of 0.25 M sodium chromate (Na2Cr2O7) are consumed in the reaction. Cr20,2(aq) + Fe²*(aq) Cr* (aq) + Fe3+ *(aq) (acidic conditions) (ii) Assign oxidation numbers to all elements in the following equation, balance the equation and calculate the volume of 0.15 M potassium permanganate (KMNO4) required to react with 10 cm³ of 0.2 M potassium sulfite (K2SO3). MnOs (aq) + SO3? (aq) MnO2(e) + SO, (aq) (basic conditions)

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(i)
Sodium chromate and iron(II) chloride are mixed in an acidic medium. Assign oxidation
numbers to all elements in the following equation, balance the equation and calculate the
number of moles of Cr* chloride produced if 15 cm3 of 0.25 M sodium chromate (Na2Cr2O7)
are consumed in the reaction.
Cr20,2 (aq) + Fe2+
Cr3+
(aq)
+ Fe* (aq) (acidic conditions)
(aq)
(ii) Assign oxidation numbers to all elements in the following equation, balance the equation and
calculate the volume of 0.15 M potassium permanganate (KMNO4) required to react with 10
cm³ of 0.2 M potassium sulfite (K2SO3).
MnOa (aq) + S03² (aq)
MnO2(s) +
SOo (aq) (basic conditions)
Transcribed Image Text:(i) Sodium chromate and iron(II) chloride are mixed in an acidic medium. Assign oxidation numbers to all elements in the following equation, balance the equation and calculate the number of moles of Cr* chloride produced if 15 cm3 of 0.25 M sodium chromate (Na2Cr2O7) are consumed in the reaction. Cr20,2 (aq) + Fe2+ Cr3+ (aq) + Fe* (aq) (acidic conditions) (aq) (ii) Assign oxidation numbers to all elements in the following equation, balance the equation and calculate the volume of 0.15 M potassium permanganate (KMNO4) required to react with 10 cm³ of 0.2 M potassium sulfite (K2SO3). MnOa (aq) + S03² (aq) MnO2(s) + SOo (aq) (basic conditions)
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