首先，要告诉大家，润莱软水机中使用的树脂就是“阳离子交换树脂”。
First of all, we should tell you that the resin used in the water softener is "cation exchange resin".
根据电荷守恒，在软水机工作中，1mol的Ca2+可以置换出2mol的Na+，碳酸钙的相对分子质量为100，钠的相对原子质量为23，因此碳酸钙与钠的交换比例为1:0.46。
According to the charge conservation, in the operation of the water softener, 1mol of Ca2 + can replace 2mol of Na +, the relative molecular mass of calcium carbonate is 100, and the relative atomic mass of sodium is 23, so the exchange ratio of calcium carbonate and sodium is 1:0.46.
以原水硬度为300mg/L（即1L水中含有300mg碳酸钙）来看，每升水会置换出138mg左右的钠。如果按每人每天喝2L水计算，就增加了276mg左右钠的摄入。
According to the raw water hardness of 300mg / L (that is, 1L of water contains 300mg of calcium carbonate), about 138mg of sodium will be replaced per litre of water. If we drink 2L water per person per day, we will increase the intake of about 276mg sodium.
中国倡导人均摄入盐含量每天最好不要超过6000mg，其中钠在盐中占40%左右，即2400mg。因此，每日通过阳离子交换树脂增加摄入的钠，还不足国家倡导含量的12%。
China advocates that the salt intake per capita should not exceed 6000mg per day, of which about 40% is sodium, or 2400mg. Therefore, the daily intake of sodium through cation exchange resin is less than 12% of the national advocacy content.
所以，实际上通过阳离子交换树脂增加摄入的钠含量极小，对人体的影响几乎忽略不计。
Therefore, in fact, the sodium content increased by cation exchange resin is very small, and the impact on human body is almost ignored.
除非是需要严格控制钠摄入的人才需要注意这一点。
Except for those who need to strictly control sodium intake.
正常的话，偶尔用来泡茶、泡咖啡是没有关系的，而且用软水泡的茶和咖啡味道更好哦~
Normally, it doesn't matter if you make tea or coffee occasionally, and the taste of tea and coffee made with soft water is better.~