【题目】有下列物质:①二氧化碳 ②硝酸钾晶体 ③液氯 ④氢气 ⑤氯水 ⑥石墨 ⑦氢氧化钠固体 ⑧稀硫酸 ⑨熔融氯化钠 ⑩铝。
请用序号回答下列问题:
(1)属于混合物的是__________;属于非金属单质的是___________。
(2)属于电解质的是__________;能够导电的是____________。
(3)能与稀盐酸发生氧化还原反应的是__________;该反应的离子方程式为____________________。
【答案】(1)⑤⑧(1分) ③④⑥(1分) (2)②⑦⑨(1分) ⑤⑥⑧⑨⑩(1分)
(3)⑩(1分) 2Al+6H+===2Al3++3H2↑(2分)
【解析】①二氧化碳是化合物,不能电离产生自由移动的离子,是非电解质,不能导电;②硝酸钾晶体是盐,属于电解质,由于离子不能自由移动,因此不能导电;③液氯是非金属单质,由分子构成,不能电离产生自由移动的离子,因此不能导电;④氢气是非金属单质,由分子构成,不能电离产生自由移动的离子,因此不能导电;⑤氯水是氯气的水溶液,是混合物,含有HCl和次氯酸,它们电离产生自由移动的离子,因此可以导电;⑥石墨是非金属单质,含有自由移动的电子,可以导电;⑦氢氧化钠固体是碱,属于电解质,由于含有的离子不能自由移动,因此不能导电;⑧稀硫酸是硫酸的水溶液,属于混合物,硫酸电离产生大量自由移动的离子,因此可以导电;⑨熔融氯化钠是盐,属于电解质,该物质是离子化合物,在熔融状态下电离产生自由移动的离子,因此可以导电;⑩铝是金属单质,含有自由移动的电子,因此可以导电。(1)在上述10种物质中,属于混合物的是⑤⑧;属于非金属单质的是③④⑥。(2)属于电解质的是②⑦⑨;能够导电的是⑤⑥⑧⑨⑩。(3)能与稀盐酸发生氧化还原反应的是⑩铝,反应方程式是2Al+6HCl===2AlCl3+3H2↑,离子方程式是2Al+6H+===2Al3++3H2↑。
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Thank you for choosing Wisdom Mission School for your child’s future. We are committed to provide quality education with love.
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5851 Newman St.
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Phone: 1-714-995-1900 1-562-833-2070
Fax: 1-714-995-1910
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Transcript (Sent directly by previous school)
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Enrollment Agreement along with Tuition/Fees Payment.
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