A 5.10 g sample of a white powder identified as cocaine is analyzed in a laboratory. The complete sample dissolves in water. In the lead adding sodium hydroxide to the dissolved sample, cocaine is converted into the base form crack cocaine, explain which forms a white solid that doesn't 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?