A 5.10 g sample of a white powder identified as cocaine is analyzed in a laborat

Question

A 5.10 g sample of a white powder identified as cocaine is analyzed in a laboratory. The entire sample dissolves in water. Upon adding sodium hydroxide to the dissolved sample, cocaine is converted into the base form (crack cocaine), which forms a white solid that does not dissolve in water and sinks to the bottom of the beaker. if 2.00 g of the base form of cocaine are recovered, was the original sample a pure sample or a mixture? if it was a pure sample, was it a compound or an element? if it was a mixture, was it heterogeneous or homogeneous?

Explanation / Answer

The original sample had to be a mixture, or the entire 5.10g would of formed the base. It would of been a homogenous mixture since we didn't know it was a mixture until it dissolved and formed the base.

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