下列离子方程式书写正确的是_刷题宝

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下列离子方程式书写正确的是

A：用氨水吸收足量的CO₂气体：OH^－＋CO₂ = HCO₃

B：向次氯酸钙溶液通入SO₂：Ca²⁺+2ClO^-+SO₂+H₂O= CaSO₃↓+2HClO

C：淀粉碘化钾溶液在空气中变蓝：4I^－＋O₂＋2H₂O = 4OH^－＋2I₂

D：常温下铁与浓硫酸作用：2Fe + 12H⁺ + 3SO₄²^— = 2Fe³⁺ + 3SO₂↑+6 H₂O

上一题下一题 0.0难度选择题更新时间:2017-05-02 11:36:08

答案(点此获取答案解析）

C

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Dining-room	Breakfast is served in the dining-room from 8 to 9 a.m.. The room staff will bring breakfast to your room at any time after 7 a.m. in this case, please fill out a card and hang it outside your door when you go to bed. Lunch: 12 to 2: 30 p.m. Dinner: 7:30 to 9:00 p.m.
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Telephones	To make a phone call, dial 0 for the Reception Desk to be connected.
Shop	The hotel shop is open from 9:00 a.m. to 5:30 p.m..
Laundry	We have a laundry in the building, and will wash, iron and return your clothes within 24 hours. Ask the room staff to collect them.
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