a. PTHH: \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
b. Theo định luật bảo toàn khối lượng ta có:
\(m_{Al}+m_{H_2SO_4}=m_{Al_2\left(SO_4\right)_3}+m_{H_2}\left(1\right)\)
c. \(\left(1\right)\Leftrightarrow5,4+m_{H_2SO_4}=342+6\)
\(\Leftrightarrow m_{H_2SO_4}=342,6\left(g\right)\)
a) nhôm + axit sunfuric → nhôm sunfat + khí hidro
b) Theo ĐL BTKL ta có:
\(m_{Al}+m_{H_2SO_4}=m_{Al_2\left(SO_4\right)_3}+m_{H_2}\)
c) Theo b) ta có:
\(m_{H_2SO_4}=m_{Al_2\left(SO_4\right)_3}+m_{H_2}-m_{Al}=342+6-5,4=342,6\left(g\right)\)