We did a recrystallization lab and I gave the information on the two unknowns in the questions but I need help with my answers.

Recrystallization lab the four unknown options are

Benzoic acid 67g/L hot water

Vanillin 68g/L hot water

Phthalic acid 180g/L hot water

Salicylic acid 68g/L hot water

Question 1 Identify unknown 1 and briefly explain how you reached your conclusion (5 marks)

Initial weight 0.163g

Recrystallized at 0.152g

Melted at 81C

Question 2 Identify unknown 2 and briefly explain how you reached your conclusion (5 marks)

Initial weight 0.149 g

Weight after recrystallization 0.101g

Vanillin since there is no detectable odor we can rule out vanillin

Melting point 125.6C Melting point temperature is near Benzoic acid, so the unknown is benzoic acid?