Question

Answer 1

Câu 6:

\(Ca+\dfrac{1}{2}O_2\rightarrow CaO\)

\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)

\(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3\downarrow+H_2O\)

\(CaCO_3+H_2SO_4\rightarrow CaSO_4+H_2O+CO_2\uparrow\)

Answer 2

Câu 7:

Ta có: \(n_{H_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\) \(\Rightarrow m_{H_2}=0,3\cdot2=0,6\left(g\right)\)

Bảo toàn Hidro: \(n_{H_2SO_4}=n_{H_2}=0,3\left(mol\right)\) \(\Rightarrow m_{H_2SO_4}=0,3\cdot98=29,4\left(g\right)\)

Bảo toàn khối lượng: \(m_{muối}=m_{KL}+m_{H_2SO_4}-m_{H_2}=43,3\left(g\right)\)

Answer 3

1A

2D

3D

4C

5B