question archive Balance the equation: ___C2O4^2- +_____H^+ +_______MnO4^- yields _____CO2 + _____Mn^2+ + ____H2O a) Mass Na2C2O4: 0
Balance the equation: ___C2O4^2- +_____H^+ +_______MnO4^- yields _____CO2 + _____Mn^2+ + ____H2O a) Mass Na2C2O4: 0
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Balance the equation:
___C2O4^2- +_____H^+ +_______MnO4^- yields _____CO2 + _____Mn^2+ + ____H2O
a) Mass Na2C2O4: 0.278 g
b) Molar mass of Na2C2O4 :
c) Moles Na2C2O4:
d) Volume of solution: 50.00 mL
e) Molarity of Na2C2O4 :
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(1)
5C2O42- + 16H+ + 2MnO4-—> 10CO2 + 2Mn2+ + 8H2O
(2)
a) Mass Na2C2O4: 0.278 g
b) Molar mass of Na2C2O4 : 134 g/mol
c) Moles Na2C2O4:
0.278 grams * 1 mol/134 grams = 2.07 x 10-3 mol
d) Volume of solution: 50.00 mL
50 ml * 1L/1000 mL= 0.05 L
e) Molarity of Na2C2O4 :
Molarity= mol/ L
= 2.07 x 10-3 mol / 0.05L
=0.041 M
Step-by-step explanation
(1) Balance by inspection:
5C2O42- + 16H+ + 2MnO4-—> 10CO2 + 2Mn2+ + 8H2O
(2)
a) Mass Na2C2O4: 0.278 g
b) Molar mass of Na2C2O4 : 134 g/mol
c) Moles Na2C2O4:
0.278 grams * 1 mol/134 grams = 2.07 x 10-3 mol
d) Volume of solution: 50.00 mL
50 ml * 1L/1000 mL= 0.05 L
e) Molarity of Na2C2O4 :
Molarity= mol/ L
= 2.07 x 10-3 mol / 0.05L
=0.041 M
