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15问答网 > 溶液的pH和酸碱性有什么关系？是不是pH<7溶液就显酸性，反之显碱性？

溶液的pH和酸碱性有什么关系？是不是pH<7溶液就显酸性，反之显碱性？

2025-03-29 13:26:47

推荐回答（1个）

回答1：

PH不是衡量溶液显酸性还是碱性的标准,唯一的标准是氢离子的浓度与氢氧根离子的浓度相等,这样溶液才显中性.如果氢离子浓度大于氢氧根离子浓度,那么便显酸性,反之显碱性.在室温25℃下,PH=7才代表中性,温度改变会影响PH值,因为温度对于水的电解平衡有影响,使得PH改变.
活性水是经过多重过滤的水,剩余矿物质并呈弱碱性,5度天然无气苏打水中含有碳酸氢钠以及其他的矿质元素,应该是属于天然的活性水.

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