A sufficient amount of copper was reacted with 50ml 18mol / L sulfuric acid under heating conditions, and after the reaction was stopped, the amount of reduced H2SO4 was A.0.45mol B.0.45~0.9mol C.0.9mol D.<0.45mol

A sufficient amount of copper was reacted with 50ml 18mol / L sulfuric acid under heating conditions, and after the reaction was stopped, the amount of reduced H2SO4 was A.0.45mol B.0.45~0.9mol C.0.9mol D.<0.45mol

D
Cu+2H2SO4(concentrated)= heating = CuSO4+2H2O+SO2↑
According to the reaction formula, if all 50ml 18mol /L participate in the reaction, it is reduced by half, i.e.0.45mol, but as the reaction proceeds, the sulfuric acid concentration decreases continuously, and finally the sulfuric acid is diluted and does not react with copper. Therefore, in fact, the sulfuric acid does not participate in the reaction, i.e. the answer is D

D
Cu+2H2SO4(concentrated)= heating = CuSO4+2H2O+SO2↑
According to the reaction formula, if all 50ml 18mol /L participate in the reaction, it is reduced by half, i.e.0.45mol, but as the reaction proceeds, the sulfuric acid concentration decreases, and finally the sulfuric acid is diluted, and does not react with copper. Therefore, in fact, the sulfuric acid does not participate in the reaction, i.e. the answer is D

50Ml 18mol addition and heating of a sufficient amount of cu per liter of sulfuric acid, the amount of substance of sulfuric acid to be reduced is A <0.45mol B =0.45 mol C is between 0.45-090mol D 0.90mol above 50Ml 18mol amount of the substance of the sulfuric acid being reduced is A <0.45mol B =0.45 mol C is between 0.45-090mol D 0.90mol above

The sulfuric acid solution given in the title contains 0.9 mol of sulfuric acid
Typically, dilute sulfuric acid is considered when the concentration of sulfuric acid decreases to 9 mol/L
Therefore, when 0.45 mol sulfuric acid is consumed, the reaction is stopped
The consumed sulfuric acid is partially reduced and partially saltated as an acid, so that the amount of the reduced sulfuric acid must be less than 0.45 mol

The sulfuric acid solution given in the title contains 0.9 mol of sulfuric acid
Typically, dilute sulfuric acid is considered when the concentration of sulfuric acid decreases to 9 mol/L
Therefore, when 0.45 mol sulfuric acid is consumed, the reaction stops
The consumed sulfuric acid is partially reduced and partially saltated as an acid, so that the amount of reduced sulfuric acid must be less than 0.45 mol

The sulfuric acid solution given in the title contains 0.9 mol of sulfuric acid
Typically, dilute sulfuric acid is considered when the concentration of sulfuric acid decreases to 9 mol/L
Therefore, when 0.45 mol sulfuric acid is consumed, the reaction stops
The consumed sulfuric acid is partially reduced and partially saltated as an acid, so that the amount of the reduced sulfuric acid must be less than 0.45 mol