cupric oxalate

例句：

1. 1.The chemical reaction between copper and oxygen produces a cupric oxide that is used in various industrial processes.
   铜和氧气之间的化学反应产生了一种用于各种工业过程的氧化铜。
2. 2. The presence of this compound can be detected by its distinctive green color when it reacts with acids.
   这种化合物的存在可以通过其与酸反应时特有的绿色来检测出来。
3. 3. In the laboratory, cupric oxalate is often used as an indicator for detecting trace amountsof iron in water samples.
   在实验室里，铜绿酸盐常被用作检测水样中铁含量的指示剂。