Hi, I did the Multi-Step Synthesis: the conversion of benzaldehyde to benzoilic

Question

Hi,

I did the Multi-Step Synthesis: the conversion of benzaldehyde to benzoilic acid in the lab.

Below is my data:

Mass of thiamine hydrochloride: 0.307 g

Mass of Crude benzoin: 0.485 g

Mass of Pure benzoin: 0.162 g

Melting point of crude benzoin: 129.8 degree

Melting point of pure benzoin: 129 degree

Mass of Benzil: 0.590 g

Melting point of pure benzyl: 92.2 degree

Mass of benzilic acid: 0.097 g

Melting point of benzilic acid: 159 degree

When prepare benzil, I used 0.304 g of benzoin that I got before.

When prepare benzilic acid, I used 0.102 g benzil.

Can anyone help me to calculate the theoretical yield, percent yield for each reaction (benzoin, benzil, benzilic acid), and percent error on melting points for each reaction (benzoin, benzil, benzilic acid)?

Thanks

Explanation / Answer

how much benzaldehyde you used? that's the key

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