Karin's Blog

What to is Qualitative Indicator for the Presence of Copper Chloride Dihydrate

While the new method employing ammonia as a qualitative indicator for the presence of Copper Chloride Dihydrate (WSDTY) in the reaction solution has a much greater accuracy than the method currently in use, it still does not yield results that are in agreement with the known value. The theoretical percent Cu of 37.3% lies just outside the 95% confidence interval for this method. A likely cause of error is improperly differentiating between a light blue and colorless ammonia test result, the last two test tubes on the right in Figure 3, causing the continuation of the experiment while small amounts [...]

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