[填空题]
Biological dyes contaminated a local pond. These dyes are know g pzp.w8ol of1fbr9;wtd f,79n to bec2.p8m2fnw;jw 7 xt lfa2q- me soluble solids. A sample of the polluted pond water was ca-w pfmcmnqfj272e.2xl ;t8 w ollected for separation and further identification of the dyes to determine how best to remediate the area.
1.State whether this mixture is , explaining your answer.
2.State the technique that could be used to remove the wood chips, algae, and plant matter from the mixture.
3.State the technique that could be used to isolate the dissolved solids (salts, dyes, etc) from the water.
4.State the technique that could be used to separate the salts from the dyes.
5.Explain the properties of the substances that enable their separation in question (d).
6.Once the dyes have been separated from the remainder of the sample, paper chromatography could be used to determine how many dyes are present. State the identity of the stationary phase and an example of a mobile phase.
7.From the following paper chromatogram, state which dye has a greater affinity for the mobile, describing the evidence to support this answer.
参考答案: 空格1: heterogenous
空格2: evaporation
空格3: recrystallization
空格4: A
