首页 / 食盐是维持人体正常生理活动必不可少的物质。低钠盐能预防高血压

食盐是维持人体正常生理活动必不可少的物质。低钠盐能预防高血压

食盐是维持人体正常生理活动必不可少的物质。低钠盐能预防高血压，碘盐能补充人体所需的碘元素，工业用盐使用不当易使人中毒。

(1)氯化钠中质量分数较大的是__ _(填名称)元素。

(2)硫酸镁可以改变钠盐的“口味”，硫酸镁的化学式为_。

(3)碘盐中加了碘酸钾(KIO3)，则KIO3中碘元素的化合价为___。

(4)工业用盐含NaNO2，NaNO2的名称为_。(填字母)

A．磷酸钠　B．硝酸钠　C．亚硝酸钠

答案

氯__MgSO4___＋5  _C__

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