Answer:
6.79 litres
Step-by-step explanation:
Potassium dichromate is K2Cr2O7
Its molar mass = 294.18 g/mol
If,
1 mole = 294.18 g
3 mole = 3 x 294.18 g
= 882.54 g
Solubility of K2Cr2O7 is
4.9 g/100 mL at 0⁰c
13 g/100 mL at 20⁰c
102 g/100 mL at 100⁰c
No specific temperature is given so I have used 20⁰C since it is close to room temperature.
at 20⁰C:
13 g of K2Cr2O7 would dissolve in = 100 mL
So 1 g of K2Cr2O7 dissolves in = (100/13)
= 7.692
882.54 g of K2Cr2O7 dissolves in = 882.54 x 7.692
= 6788.59mL
We convert to litres
= 6.79 L