| 单词 |
temporary hardness |
| 释义 |
temporary hardnessnoun [mass noun]The presence in water of mineral salts (chiefly calcium bicarbonate) that are removed by boiling.The temporary hardness is caused by the magnesium and calcium bound in hydrogen carbonate or carbonate....- There are two types of hardness, resulting from different compounds - permanent and temporary hardness.
- Make sure you know how and why temporary hardness is removed.
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