Problem: Cocaine (C17H21O4N) is a natural substance found in coca leaves, which have been used for centuries as a local anesthetic and stimulant. Illegal cocaine arrives in the United States either as the pure compound or as the hydrochloride salt (C17H21O4NHCl). At 25°C, the salt is very soluble in water (2.50 kg/L), but cocaine is much less so (1.70 g/L). (a) What is the maximum mass (g) of the hydrochloride salt that can dissolve in 50.0 mL of water?(b) If the solution from part (a) is treated with NaOH, the salt is converted to cocaine. How much more water (L) is needed to dissolve it?

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Cocaine (C17H21O4N) is a natural substance found in coca leaves, which have been used for centuries as a local anesthetic and stimulant. Illegal cocaine arrives in the United States either as the pure compound or as the hydrochloride salt (C17H21O4NHCl). At 25°C, the salt is very soluble in water (2.50 kg/L), but cocaine is much less so (1.70 g/L). 

(a) What is the maximum mass (g) of the hydrochloride salt that can dissolve in 50.0 mL of water?

(b) If the solution from part (a) is treated with NaOH, the salt is converted to cocaine. How much more water (L) is needed to dissolve it?

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