回答下列问题:
(1)装置A中只用一种试剂,该试剂是
A.
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写出装置B中发生反应的化学方程式:
(2)指导老师从环保角度考虑,指出该装置有明显的缺陷,请你提出修改建议:
(3)C中发生反应的化学方程式为
(4)下列说法正确的是
A.农业上施用A中所用试剂会大大提高粮食产量且对环境无影响
B.向A中所用试剂的溶液中加入足量氢氧化钡溶液发生反应的离子方程式为:
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C.装置C中发生的反应体现了
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(5)某同学提出装置D、E之间应增加一个空的集气瓶,其目的是
(6)写出Cu片溶解反应的离子方程式:
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同类型试题
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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
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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
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