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亚硝酸(HNO 2 )是一种比醋酸略强的弱酸，很不稳定，易发生自身氧化还原反应而分解。 (1)低温下，将等物质的量的NO和NO 2 通入水中，可制得HNO 2 ，反应的化学方程式为__________________. (2)NO 2 － 既有氧化性又有还原性，其氧化产物或还原产物与溶液的pH的关系如下表所示： ①在碱性条件下，NaNO 2 溶液与NaClO溶液反应的离子方程式为 _______________. ②若HNO 2 与氢碘酸反应时按物质的量之比1∶2进行，且I － 被氧化成I 2 ，则产物中含氮的物质为__________(填化学式). (3)在冷冻的NaNO 2 溶液中加入或通入下列物质，不能制得HNO 2 的是________(填序号). a．稀H 2 SO 4 b．稀HCl        c．CO 2 d．SO 2
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相关题目：
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【单选题】Which of the following statements is true of the new product development process?
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