Detection of the purity of ethyl acetate
A person in Sijia obtained ethyl acetate. He suspected that its purity was not good, so he tried to detect it.

It is taken from a container, clean and dry, with an appropriate amount of ethyl acetate. First look at its color, clear and clear, like the clear water of autumn. Smell its gas again, fragrant like fruity, but I dare not settle it.

Then test it by distillation. Set a kettle on fire, so that ethyl acetate gradually heats up and boils, and observe its boiling point. See its gas condensing in a tube, dripping into the container, if the jade beads fall. Record the number of boiling points, compare the constant values, and observe its deviation. If the boiling point is normal, the purity is suspicious.

In addition, by chemical method, an appropriate amount of ethyl acetate is taken, put into the reaction vessel, and added to the reagents. Observe the reaction image, and observe whether there are any impurities. If impurities are present, the state of the reaction is different from that of the pure.

After various tests, record the situation in detail, and reason cautiously. If all items are in accordance with normal standards, the purity of ethyl acetate can be determined; if there is any error, the cause must be investigated, either because it is not refined at the time of preparation, or because it is contaminated at the time of storage.

Jia people follow this method, and the purity of ethyl acetate can be determined without error in commercial affairs.