A.将鸡蛋壳在醋酸中溶解有气泡产生:CaCO3+2H+=Ca2++H2O+CO2↑ |
B.向CuSO4溶液中加入NaOH溶液:Cu2++2OH-=Cu(OH)2↓ |
C.将Cu丝插入AgNO3溶液中:Cu+Ag+=Cu2++Ag |
D.向Ba(OH)2溶液中逐滴加入KHSO4溶液至溶液呈中性:H++SO+Ba2++OH-=H2O+BaSO4↓ |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2