Which of the following is an example of a mixture?

  

  Which of the following methods is used to separate a solid from a liquid in a heterogeneous mixture?

  

  In the following paper chromatogram using water as the solvent, which component of the mixture (1 or 2) has the greatest affinity for the mobile phase, and what is the identity of the mobile phase?

  The diagram below represents the heating of ic+mkm cj d34.vgfa 7a-se starting at $-20^{\circ}C$.


1.Complete the table.
In the graph 1 to 5,What phase(s) is/are present?What is happening at the particle level?What phase change, if any, is taking place?
2.Give the melting point of the substance. ----待选择----gasliquidsolidpiasma 
3.Identify the state of particles at $110^{\circ}C$.  

  A mixture is composed of wood chips, water, and sodium chloride. Which sequence of techniques could be used to isolate the wood chips and the sodium chloride separately?

  

  Biological dyes contaminated a local pond. These dyes are knnoug;frvsdr- z+ y . zz7j5)ln; 6m+huown to be soluble solids. A sample of the polluted pond water was collected for separation and further identification of the dyes to determine howh5u.uz;vr z; ny)+n j lm ro-g7zf6+sd best to remediate the area.


1.State whether this mixture is  ----待选择----homogeneousheterogeneous , 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  ----待选择----AB  has a greater affinity for the mobile, describing the evidence to support this answer.

  Paper chromatography is a technique that can be used to separate which of the following?

  The table below shows the data gathered by a chemist regarding substances A, B, -pqt z,b2jf+1f6 g/5jk menbuand C. Using the data given, discuss which is a pure substance or a mixture. If the substance is a pure substfpqn/2g 1fb+m j, ut6kezb5 -jance, determine whether it is an element or a compound.

Substance	Appearance	Melting point	Observed property
A	White crystalline solid	801$^{\circ}$	In aqueous solution, it reacts with silver nitrate forming a precipitate of silver chloride
B	Silver metallic appearance	660$^{\circ}$	Reacts with oxygen forming an oxide
C	Fine white crystalline solid	186$^{\circ}$-800$^{\circ}$	Readily dissolves in water

Substance A- ----待选择----pure substancemixture  ----待选择----elementcompound 

Substance B- ----待选择----pure substancemixture  ----待选择----elementcompound 
Substance C- ----待选择----pure substancemixture