In the process of purification of crude salt, there are the following operations: ① filtration ② dissolution ③ evaporation ④ weighing ⑤ reweighing (1) The filtration operation is for the separation of ______ and ____ (1) filtration is a separation of insoluble solids and liquids; evaporation operation to use the non-glass apparatus for the evaporation dish; so the answer is: solid (insoluble solids), liquid (soluble solids), evaporation dish;

(2) crude salt in sodium chloride is soluble in water, the impurities are not soluble in water, so can be obtained by dissolution, filtration, evaporation of table salt. To calculate the yield, you need to weigh the mass of crude salt and refined salt, so the steps are ④ ② ① ③ ⑤; dissolution, filtration, evaporation need to use the instrument is a glass rod;

The answer is: ④ ② ① ③ ⑤, ① ② ③

(3) by the mass of the refined salt obtained from the mass of the crude salt and the mass of the dissolved crude salt, calculate the yield; therefore, the yield:

4.6g

5.0g

x 100%=92%; the purified refined salt contains soluble impurities such as magnesium chloride and calcium chloride; filtration can only remove insoluble impurities, but not other soluble impurities, so the refined salt is a mixture.

The answer is: 92%, mixture.

The answer is: 92%, mixture.